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1.
The effect of
heat treatment on
microstructure
and martensitic transformation temperatures in Ni44Fe19Ga27Co10 single crystals / E. E. Timofeeva, E. Yu. Panchenko, A. B. Tokhmetova [et al.]> // Phys. Scr. - 2024. -
Vol. 99
,
Is. 1
. - Ст. 015958,
DOI
10.1088/1402-4896/ad16b2. - Cited References: 34. - This work was supported by the Russian Science Foundation (grant No. 21-19-00287) . - ISSN 0031-8949. - ISSN 1402-4896
Кл.слова (ненормированные):
martensitic transformations
--
single crystals
--
aging
--
second phase particles
--
microstructure
Аннотация:
The
microstructure
and temperature of martensitic transformation of Ni44Fe19Ga27Co10 single crystals after aging at temperatures from 623 K to 1173 K were studied by electron microscopy and differential scanning calorimetry. The temperature ranges of the second phase precipitation, their lattice structure and volume fraction, and also the modification of the nanodomain structure of the L21+B2 high-temperature phase were determined in dependence on aging temperature. The influence of
microstructure
parameters on the martensitic transformation temperatures, transformation intervals and thermal hysteresis has been discussed.
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Держатели документа:
Tomsk State University, Novosobornaya square 1, Tomsk, 634050, Russia
Kirensky Institute of Physics, FRC KSC SB RAS, Krasnoyarsk, 660036, Russia
Доп.точки доступа:
Timofeeva, E. E.; Panchenko, E. Yu.; Tokhmetova, A. B.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Zherdeva, M. V.; Tagiltsev, A. I.; Surikov, N. Yu.; Chumlyakov, Yu. I.
}
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2.
Biodegradable polymer casting
films for drug delivery and cell culture / A. V. Murueva, A. E. Dudaev, E. I. Shishatskaya [et al.]> // Giant. - 2024. -
Vol. 19
. - Ст. 100314,
DOI
10.1016/j.giant.2024.100314. - Cited References: 112. - The study was funded by State Assignment of the Ministry of Science and Higher Education of the Russian Federation (project No. FWES-2021–0025) . - ISSN 2666-5425
Кл.слова (ненормированные):
Degradable polyhydroxyalkanoates
--
Copolymers P(3HB--3HV) and P(3HB--4HB)
--
Solvent casting films
--
Microstructure
and properties
--
Drugs
--
Release kinetics
--
Antibacterial activity
--
Keratinocytes proliferation
Аннотация:
In this work, for the first time, films were obtained based on biodegradable polyhydroxyalkanoates (PHAs) - a copolymer of 3-hydroxybutyrate-co-3-hydroxyvalerate P(3HB-co-3HV) and a copolymer of 3-hydroxybutyrate-co-4-hydroxybutyrate P(3HB-co-4HB), containing drugs of different chemical structure and action - antibiotics (ceftazidime, doripenem), antiseptic (chlorhexidine) and tissue regeneration stimulator (Actovegin) for drug delivery and cell culture. Using SEM, AFM and measuring the contact angles of water wetting, it is shown how PHAs composition and loading of films of P(3HB-co-3HV) and P(3HB-co-4HB) with drugs affect the porosity, roughness indicators and adhesive properties of the surface. The constructed films are a depot form of drug, the release of which in vitro is realized for a long time, without burst releases, corresponds to Korsmeyer-Peppas and Higuchi models with diffusion character. Films loaded with antibiotics have pronounced antibacterial activity and suppress the development of pathogens S. aureus and E. coli, without a pronounced negative effect on the adhesion and proliferation of epidermal cells. In the cultures of human keratinocytes HaCaT it was shown that the presence of actovegin, as well as ceftazidime in the films, exhibits a stimulating effect, increasing their number. The results demonstrate the suitability of the depot-films for cellular technologies and are promising for the reconstruction of tissues complicated by infection.
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Держатели документа:
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk 660036, Russia
Siberian Federal University, 79 Svobodnyi av., Krasnoyarsk 660041, Russia
Infochemistry Scientific Centre, ITMO University, Lomonosova St. 9, St. Petersburg 191002, Russia
Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50 Akademgorodok, Krasnoyarsk, 660036, Russia
L.V. Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Science Center SB RAS, 50/12 Akademgorodok, Krasnoyarsk, 660036, Russia
Доп.точки доступа:
Murueva, A. V.; Dudaev, A. E.; Shishatskaya, E. I.; Ghorabe, F. D. E.; Nemtsev, I. V.; Немцев, Иван Васильевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Volova, T. G.
}
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3.
Phases,
microstructure
and
magnetic properties in a severely deformed Cr-Ni–Al alloy / L. I. Kveglis, D. E. Yerbolatuly, F. M. Noskov [et al.]> // J. Supercond. Nov. Magn. - 2023. -
Vol. 36
,
Is. 4
. - P. 1249-1255,
DOI
10.1007/s10948-023-06567-8. - Cited References: 22. - The authors express their gratitude to Nurgamit Kantay (East-Kazakhstan University named after S. Amanzholov) for his help in conducting the experiment . - ISSN 1557-1939. - ISSN 1557-1947
Кл.слова (ненормированные):
Nickel–chromium alloy
--
Coercive force
--
Magnetic anisotropy
--
Super-plasticity
--
Intermetallic phases
Аннотация:
The phases,
microstructure
, and magnetic properties in a severely deformed Cr-Ni–Al alloy have been studied. The eutectic
microstructure
observed in localized regions of the alloy can be interpreted as a result from the super-Arrhenius relaxation of the alloy. According to X-ray diffraction and magnetometry, the nanosized nickel inclusions in the matrix of the chromium-nickel γ-solid solution are formed. It is shown that, after severe (superplastic) deformation, a unidirectional magnetic anisotropy is induced, which may be associated with the antiferromagnetic coupling between the CrNi2 matrix and the nickel inclusions.
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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russia
East Kazakhstan University named after S. Amanzholov, Ust-Kamenogorsk, Kazakhstan
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Доп.точки доступа:
Kveglis, Ludmila I.; Yerbolatuly, Dosym E.; Noskov, Fedor M.; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Volochaev, M. N.; Волочаев, Михаил Николаевич
}
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4.
Asymmetric resonant light
absorption in a chloroplast
microstructure
/ P. S. Pankin, A. V. Shabanov, D. N. Maksimov [et al.]> // J. Opt. Soc. Am. B. - 2023. -
Vol. 40
,
Is. 1
. - P. 87-93,
DOI
10.1364/JOSAB.477110. - Cited References: 45 . - ISSN 0740-3224. - ISSN 1520-8540
Перевод заглавия:
Асимметричное резонансное поглощение света в микроструктуре хлоропласта
Аннотация:
It is shown that in the chloroplast periodic structure with a defect, the resonant absorption of light can be implemented. It is found that the resonant light absorption depends significantly on the position of a defect. In terms of the absorption of light energy, an asymmetric resonator is more efficient than a symmetric one.
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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russia
Siberian Federal University, Krasnoyarsk, 660041, Russia
Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russia
AO NPP Radiosvyaz, Krasnoyarsk, 660021, Russia
Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russia
Доп.точки доступа:
Pankin, P. S.; Панкин, Павел Сергеевич; Shabanov, A. V.; Шабанов, Александр Васильевич; Maksimov, D. N.; Максимов, Дмитрий Николаевич; Nabol, S. V.; Наболь, Степан Васильевич; Buzin, D. S.; Бузин, Даниил Сергеевич; Krasnov, A. I.; Краснов, Алексей Ильдарович; Romanenko, G. A.; Романенко, Гавриил Александрович; Sutormin, V. S.; Сутормин, Виталий Сергеевич; Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Zelenov, Fyodor V.; Masyugin, Albert N.; Vyatkin, Vladimir P.; Nemtsev, I. V.; Немцев, Иван Васильевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Vetrov, S. Ya.; Ветров, Степан Яковлевич; Timofeev, I. V.; Тимофеев, Иван Владимирович
}
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5.
The effect of
aluminum-oxide powders on the structure and properties of copper electrodeposited composite coatings / I. R. Volkova, L. E. Tyryshkina, M. N. Volochaev [et al.]> // Prot. Met. Phys. Chem. Surf. - 2023. -
Vol. 59
,
Is. 1
. - P. 71-75,
DOI
10.1134/S2070205122700022. - Cited References: 9 . - ISSN 2070-2051. - ISSN 2070-206X
Кл.слова (ненормированные):
copper electrodeposited composite coatings
--
aluminum-oxide nanopowder
--
alumina
--
microstructure
--
microhardness
--
ultimate tensile strength
Аннотация:
Copper electrodeposited composite coatings containing two types of aluminum-oxide powders with different dispersities (alumina Al2O3-1 and electroexplosive aluminum-oxide nanopowder Al2O3-2) are obtained during the work. The studies show that introducing the powders leads to a change in the
microstructure
of the composites and a change in the grain growth principles during the formation of the coatings. Refinement and ordering of the grain structure of the coatings occurs and twinning defects and texture are formed. The change in the formation of the
microstructure
of the composites leads to a change in some operational characteristics: an increase in the microhardness (by 10% in the composites with the addition of alumina and by more than 30% in the coatings with electroexplosive aluminum oxide) and ultimate tensile strength (by 20% in the composites with Al2O3-1 and almost 1.5-fold in the samples with Al2O3-2).
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Публикация на русском языке
Влияние порошков оксида алюминия на структуру и свойства медных композиционных гальванических покрытий [Текст] / И. Р. Волкова, Л. Е. Тырышкина, М. Н. Волочаев [и др.] // Физикохим. поверхн. и защита материалов. - 2023. - Т. 59 № 1. - С. 39-44
Держатели документа:
Federal Research Center “Krasnoyarsk Science Center”, Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia
Reshetnev Siberian State University of Science and Technology, 660037, Krasnoyarsk, Russia
Доп.точки доступа:
Volkova, I. R.; Tyryshkina, L. E.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Zaloga, A. N.; Shabanova, K. A.; Ovchinnikov, A. V.; Lyamkin, A. I.
}
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6.
Микроструктура и магнитные
свойства высоко энтропийных сплавов FeCoNiP-Me (Me=Zn, Zr, W), полученных методов химического осаждения / Л. А. Чеканова, Е. А. Денисова, С. В. Комогорцев [и др.]> //
Магнитные материалы. Новые технологии : тез. докл. IX Байкал. междунар. конф. BICMM-2023 / чл. прогр. ком.: S. S. Aplesnin [et al.] ; чл. орг. ком. R. S. Iskhakov [et al.]. - Иркутск, 2023. - С. 125-126,
DOI
10.26516/978-5-9624-2178-0.2023.1-207. - Библиогр.: 4 . - ISBN 978-5-962402178-0
Перевод заглавия:
Microstructure
and magnetic properties of FeCoNiP-Me (Me=Zn, Zr, W) high entropy alloys produced by electroless deposition
Материалы конференции
,
Материалы конференции
,
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Держатели документа:
Институт физики им. Л. В. Киренского СО РАН
Сибирский федеральный университет
Красноярский научный центр СО РАН
Доп.точки доступа:
Аплеснин, Сергей Степанович \чл. прогр. ком.\; Aplesnin, S. S.; Балаев, Дмитрий Александрович \чл. прогр. ком.\; Balaev, D. A.; Овчинников, Сергей Геннадьевич \чл. прогр. ком.\; Ovchinnikov, S. G.; Исхаков, Рауф Садыкович \чл. орг. ком.\; Iskhakov, R. S.; Чеканова, Лидия Александровна; Chekanova, L. A.; Денисова, Елена Александровна; Denisova, E. A.; Комогорцев, Сергей Викторович; Komogortsev, S. V.; Важенина, Ирина Георгиевна; Vazhenina, I. G.; Исхаков, Рауф Садыкович; Бондаренко, Галина Николаевна; Bondarenko, G. N.; Кох, Д.; Великанов, Дмитрий Анатольевич; Velikanov, D. A.; Немцев, Иван Васильевич; Nemtsev, I. V.; Еремин, Леонид Аркадьевич; Байкальская международная конференция "Магнитные материалы. Новые технологии"(9 ; 2023 ; сент. ; 11-14 ; Байкальск); "Магнитные материалы. Новые технологии", Байкальская международная конференция(9 ; 2023 ; сент. ; 11-14 ; Байкальск); "Magnetic materials. New tecnologies", Baikal International Conference(9 ; 2023 ; Sept. ; 11-14 ; Baikalsk); Иркутский государственный университет
}
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7.
Biodegradable polyhydroxyalkanoates formed
by 3- and 4-hydroxybutyrate monomers to produce nanomembranes suitable for drug delivery and cell culture / T. G. Volova, A. V. Demidenko, A. V. Murueva [et al.]> // Technologies. - 2023. -
Vol. 11
,
Is. 4
. - Ст. 106,
DOI
10.3390/technologies11040106. - Cited References: 116. - his research was funded by State Assignment of the Ministry of Science and Higher Education of the Russian Federation (project No. 0287-2021-0025) . - ISSN 2227-7080
Кл.слова (ненормированные):
degradable polyhydroxyalkanoates
--
copolymers P(3HB-co-4HB)
--
electrostatic molding
--
membranes
--
microstructure
and properties
--
drugs
--
release kinetics
--
antibacterial activity
--
fibroblast proliferation
Аннотация:
Biodegradable polyhydroxyalkanoates, biopolymers of microbiological origin, formed by 3- and 4-hydroxybutyrate monomers P(3HB-co-4HB), were used to obtain nanomembranes loaded with drugs as cell carriers by electrospinning. Resorbable non-woven membranes from P(3HB-co-4HB) loaded with ceftazidime, doripinem, and actovegin have been obtained. The loading of membranes with drugs differently affected the size of fibers and the structure of membranes, and in all cases increased the hydrophilicity of the surface. The release of drugs in vitro was gradual, which corresponded to the Higuchi and Korsmeyer-Peppas models. Antibiotic-loaded membranes showed antibacterial activity against S. aureus and E. coli, in which growth inhibition zones were 41.7 ± 1.1 and 38.6 ± 1.7 mm for ceftazidime and doripinem, respectively. The study of the biological activity of membranes in the NIH 3T3 mouse fibroblast culture based on the results of DAPI and FITC staining of cells, as well as the MTT test, did not reveal a negative effect despite the presence of antibiotics in them. Samples containing actovegin exhibit a stimulating effect on fibroblasts. Biodegradable polyhydroxyalkanoates formed by 3-hydroxybutyrate and 4-hydroxybutyrate monomers provide electrospinning non-woven membranes suitable for long-term delivery of drugs and cultivation of eukaryotic cells, and are promising for the treatment of wound defects complicated by infection.
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Держатели документа:
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, 660036 Krasnoyarsk, Russia
Institute of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi av., 660041 Krasnoyarsk, Russia
Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50 Akademgorodok, 660036 Krasnoyarsk, Russia
L.V. Kirensky Institute of Physics, 50/12 Akademgorodok, 660036 Krasnoyarsk, Russia
Chemistry Engineering Centre, ITMO University, Kronverkskiy Prospekt, 49A, 197101 Saint Petersburg, Russia
Доп.точки доступа:
Volova, Tatiana G.; Demidenko, Aleksey V.; Murueva, Anastasiya V.; Dudaev, Alexey E.; Nemtsev, I. V.; Немцев, Иван Васильевич; Shishatskaya, Ekaterina I.
}
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8.
Microstructural parameters for
modelling of superconducting foams / M. R. Koblischka, A. Koblischka-Veneva, Q. Nouailhetas [et al.]> // Materials. - 2022. -
Vol. 15
,
Is. 6
. - Ст. 2303,
DOI
10.3390/ma15062303. - Cited References: 62 . - ISSN 1996-1944
Кл.слова (ненормированные):
superconducting foams
--
YBCO
--
microstructure
--
modelling parameters
--
foam cells
--
current flow
Аннотация:
Superconducting YBa2Cu3Oy (YBCO) foams were prepared using commercial open-cell, polyurethane foams as starting material to form ceramic Y2 BaCuO5 foams which are then converted into superconducting YBCO by using the infiltration growth process. For modelling the supercon-ducting and mechanical properties of the foam samples, a Kelvin-type cell may be employed as a first approach as reported in the literature for pure polyurethane foams. The results of a first modelling attempt in this direction are presented concerning an estimation of the possible trapped fields (TFs) and are compared to experimental results at 77 K. This simple modelling revealed already useful information concerning the best suited foam structure to realize large TF values, but it also became obvious that for various other parameters like magnetostriction, mechanical strength, percolative current flow and the details of the TF distribution, a refined model of a superconducting foam sample incorporating the real sample structure must be considered. Thus, a proper description of the specific
microstructure
of the superconducting YBCO foams is required. To obtain a set of reliable data, YBCO foam samples were investigated using optical microscopy, scanning electron microscopy and electron backscatter diffraction (EBSD). A variety of parameters including the size and shape of the cells and windows, the length and shape of the foam struts or ligaments and the respective intersection angles were determined to better describe the real foam structure. The investigation of the foam microstructures revealed not only the differences to the original polymer foams used as base material, but also provided further insights to the infiltration growth process via the large amount of internal surface in a foam sample.
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Держатели документа:
Experimental Physics, Saarland University, P.O. Box 151150, Saarbrucken, D-66041, Germany
GREEN, Universite de Lorraine, Nancy, F-54000, France
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Koblischka, M. R.; Koblischka-Veneva, A.; Nouailhetas, Q.; Hajiri, G.; Berger, K.; Douine, B.; Gokhfeld, D. M.; Гохфельд, Денис Михайлович
}
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9.
Influence of chemical
composition and thermomechanical treatment of low-carbon steels on the
microstructure
and mechanical properties of their laser welded joints / A. I. Gordienko, A. G. Malikov, M. N. Volochaev, A. D. Panyukhina> // Mater. Sci. Eng. A. - 2022. -
Vol. 839
. - Ст. 142845,
DOI
10.1016/j.msea.2022.142845. - Cited References: 38. - Microstructural studies and mechanical tests of laser welds were performed according to the Government research assignment for ISPMS SB RAS, project FWRW-2021-0009. Part of the research related to the selection of optimal laser welding parameters for low carbon steels was carried out within Basic State Project No. 121030900259-0 . - ISSN 0921-5093. - ISSN 1873-4936
РУБ
Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
AUSTENITE GRAIN-SIZE
HEAT-AFFECTED ZONE
MARTENSITE START TEMPERATURE
Кл.слова (ненормированные):
Low-carbon steels
--
Laser welding
--
Cross-helical rolling
--
Weld metal
--
Microstructure
--
Microhardness
Аннотация:
The paper reports microstructures (revealed by transmission electron microscopy) in various zones of laser welds of the X70 and X80 low-carbon steels with different initial microstructures, as well as chemical and phase compositions. In the X70 steels with 0.13% C, the
microstructure
refinement has been achieved through helical rolling at temperatures of 920 °C and 850 °C (designated as X70-920 and X70-850, respectively). For all studied cases, both initial steel microstructures and phase compositions have determined the formation of different microstructures with various microhardness levels in the weld metal and heat-affected zones. For the X70-850 steel with a more dispersed and homogeneous
microstructure
(dF = 3.3 μm), a lower microhardness level of 340 HV has been observed in the weld metal, compared with the X70-920 one (dF = 5.5 μm, 370 HV). The reason has been the formation of both bainite and martensite laths in the X70-850 weld metal, while only lath and lamellar martensite has formed in the X70-920 one. For the X80 steel (0.55% C), lowering the carbon content and additional microalloying with chromium, molybdenum and nickel have enabled to decrease the microhardness level down to 295 HV in the weld metal due to the degenerate upper bainite formation and the carbon level reduction in martensite. The dispersed and homogeneous initial microstructures of the X70-850 and X80 steels has provided the formation of granular ferrite-bainite microstructures in the intercritical heat-affected zone. They have possessed a lower proportion of residual austenite regions and small sizes of twinned martensite areas. The welded X80 steel specimen has been characterized by higher ductile properties compared to both X70 ones.
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Держатели документа:
Russian Acad Sci, Inst Strength Phys & Mat Sci, Siberian Branch, 2-4 Pr Akad Skii, Tomsk 634055, Russia.
Russian Acad Sci, Khristianovich Inst Theoret & Appl Mech, Siberian Branch, 4-1 Inst Skaya Str, Novosibirsk 630090, Russia.
Russian Acad Sci SB RAS, Kirensky Inst Phys, Siberian Branch, Akademgorodok 50,Bld 38, Krasnoyarsk 660036, Russia.
Reshetnev Siberian State Univ Sci & Technol, 31 Pr Krasnoyarsk Worker, Krasnoyarsk 660037, Russia.
Tomsk Polytech Univ, 30 Lenin Ave, Tomsk 634050, Russia.
Доп.точки доступа:
Gordienko, A., I; Malikov, A. G.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Panyukhina, A. D.; [FWRW-2021-0009]; [121030900259-0]
}
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10.
Structural and magnetic
properties of FeNi films and FeNi-based trilayers with out-of-plane magnetization component / A. V. Svalov, A. N. Gorkovenko, A. Larranaga [et al.]> // Sensors. - 2022. -
Vol. 22
,
Is. 21
. - Ст. 8357,
DOI
10.3390/s22218357. - Cited References: 50. - This research was funded by the Russian Science Foundation (RSF), project no. 22-29-00980, https://rscf.ru/en/project/22-29-00980/ and in part by the Research Groups of the UPV-EHU . - ISSN 1424-8220
Кл.слова (ненормированные):
magnetic field sensors
--
permalloy
--
crystal structure
--
perpendicular magnetic anisotropy
--
stripe domains
--
“transcritical” state
--
columnar
microstructure
Аннотация:
FeNi films of different thickness and FeNi/(Fe, Co)/FeNi trilayers were prepared by magnetron sputtering deposition onto glass substrates. The permalloy films had a columnar
microstructure
. The detailed analysis of the magnetic properties based on the magnetic and magneto-optical measurements showed that at thicknesses exceeding a certain critical thickness, hysteresis loops acquire a specific shape and the coercive force of the films increase sharply. The possibility of the estimation of the perpendicular magnetic anisotropy constant using the Murayama equation for the thickness dependence of saturation field was demonstrated. The results of studies of the structural and magnetic properties of FeNi films laminated by Fe and Co spacers with different thickness are presented.
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Держатели документа:
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, 620002, Russian Federation
Advanced Research Facilities (SGIKER), Universidad del Pais Vasco UPV-EHU, Bilbao, 48080, Spain
Kirensky Institute of Physics FRS KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Departamento de Electricidad y Electronica, Universidad del Pais Vasco UPV/EHU, Bilbao, 48080, Spain
Доп.точки доступа:
Svalov, A. V.; Gorkovenko, A. N.; Larranaga, A.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Kurlyandskaya, G. V.
}
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11.
Comparison of the
microstructure
and magnetic properties of films and composite powders based on 3-D metal / L. A. Chekanova, N. A. Shepeta, E. A. Denisova [et al.]> // J. Supercond. Novel Magn. - 2022. -
Vol. 35
,
Is. 11
. - P. 3241-3247,
DOI
10.1007/s10948-022-06339-w. - Cited References: 19. - This work was funded by the Russian Foundation for Basic Research, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20–43-240003 . - ISSN 1557-1939
Кл.слова (ненормированные):
Composition modulated materials
--
Multilayer films
--
Composite powders
--
Anisotropy field
--
Coercivity
--
Electroless deposition
Аннотация:
The comparison between the magnetic properties of materials with different curvature and spatial distribution of nanograins, such as particles (3D spatial distribution) and multilayer films (2D) was carried out. Functionally graded Co(P)/Ni(P) and Co(P)/CoNi(P) specimens have been fabricated by electroless deposition. The magnetic and structural properties are characterized by electron microscopy, X-ray diffraction, ferromagnetic resonance spectroscopy, and vibrating sample magnetometer. It was demonstrated that the interaction between the Ni(P) core and Co(P) shell of particles could form the functionally graded materials with tailored structure and coercive force. Furthermore, it was found that the magnetic parameters (the local anisotropy field, ferromagnetic resonance linewidth, and coercivity) are mainly determined by the artificially created interface boundaries for all grains’ spatial distribution. The magnetic anisotropy field and coercivity of Co(P)/Ni(P) flat films were characterized by lower values than those for spherical shell of particles with the same composition, produced by the same method.
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, Russian Federation
Krasnoyarsk Railway Transport Institute, Branch of Irkutsk State Transport University, Krasnoyarsk, Russian Federation
Federal Research Center “Krasnoyarsk Science Center, Siberian Branch of the Russian Academy of Sciences”, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Chekanova, L. A.; Чеканова, Лидия Александровна; Shepeta, N. A.; Denisova, E. A.; Денисова, Елена Александровна; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Kuzovnikova, L. A.; Nemtsev, I. V.; Немцев, Иван Васильевич
}
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12.
Properties of degradable
polyhydroxyalkanoates with different monomer compositions / T. Volova, E. Kiselev, I. Nemtsev [et al.]> // Int. J. Biol. Macromol. - 2021. -
Vol. 182
. - P. 98-114,
DOI
10.1016/j.ijbiomac.2021.04.008. - Cited References: 109. - The part of the reported study on polymer synthesis and examination was funded by RFBR and KKRF [Grant No. 19-43-240012 “Biological and physical principles of production of new generation biomaterials”]. The work on production and investigation of polymer films was carried out as part of the State Assignment of the Ministry of Education and Science of the Russian Federation [Grant No. FSRZ-2020-0006] . - ISSN 0141-8130
Кл.слова (ненормированные):
Physicochemical properties
--
Chemical composition
--
Physicochemical properties
--
Films
--
Microstructure
--
Surface properties
Аннотация:
Purpose: To synthesize and investigate polyhydroxyalkanoates (PHAs) with different monomer composition and percentages and polymer films prepared from them. Results: Various PHAs: homopolymer poly-3-hydroxybutyrate P(3HB) and 2-, 3-, and 4-component copolymers comprising various combinations of 3-hydroxybutyrate (3HB), 3-hydroxyvalerate (3HV), 4-hydroxybutyrate (4HB), and 3-hydroxyhexanoate (3HHx) monomers were synthesized under specialized conditions. Relationships were found between the monomer composition of PHAs and their molecular-weight and thermal properties and degree of crystallinity. All copolymers had decreased weight average molecular weights, Mw (to 390–600 kDa), and increased values of polydispersity (3.2–4.6) compared to the P(3HB). PHA copolymers showed different thermal behavior: an insignificant decrease in Tmelt and the presence of the second peak in the melting region and changes in parameters of crystallization and glass transition. At the same time, they retained thermostability, and the difference between Tmelt and Tdegr was at least 100–120 °C. Incorporation of 4HB, 3HV, and 3HHx monomer units into the 3-hydroxybutyrate chain caused changes in the amorphous to crystalline ratio and decreased the degree of crystallinity (Cx) to 20–40%. According to the degree to which the monomers reduced crystallinity, they were ranked as follows: 4HB – 3HHx – 3HV. A unique set of films was produced; their surface properties and physical/mechanical properties were studied as dependent on PHA composition; monomers other than 3-hydroxybutyrate were found to enhance hydrophilicity, surface development, and elasticity of polymer films. Conclusion: An innovative set of PHA copolymers was synthesized and solution-cast films were prepared from them; the copolymers and films were investigated as dependent on polymer chemical composition. Results obtained in the present study contribute to the solution of a critical issue of producing degradable polymer materials.
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Держатели документа:
Siberian Federal University, 79 Svobodnyi av., Krasnoyarsk, 660041, Russian Federation
Institute of Biophysics SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
L.V. Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/12 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Volova, T.; Kiselev, E.; Nemtsev, I. V.; Немцев, Иван Васильевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Sukovatyi, A.; Kuzmin, A.; Ryltseva, G.; Shishatskaya, E.
}
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13.
Grain-size dependence of
magnetic
microstructure
and high-frequency susceptibility of nanocrystalline thin films: A micromagnetic simulation study / A. V. Izotov, B. A. Belyaev, P. N. Solovev, N. M. Boev> // J. Magn. Magn. Mater. - 2021. -
Vol. 529
. - Ст. 167856,
DOI
10.1016/j.jmmm.2021.167856. - Cited References: 73. - The reported study was funded by RFBR, the Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund and JSC «NPP «Radiosviaz», project number 20-42-242901 . - ISSN 0304-8853
Кл.слова (ненормированные):
Micromagnetic simulation
--
Nanocrystallites
--
Local magnetic anisotropy
--
Ferromagnetic resonance
--
Magnetization ripple
--
Two-magnon scattering process
Аннотация:
The size of crystallites is one of the most important factors that determine the key characteristics of nanocrystalline thin magnetic films that make them very promising media for various applications. In this paper, using micromagnetic simulation, we study in detail the influence of the grain size on the magnetic
microstructure
of the films and its relation with high-frequency dynamics of magnetization. When the grain size exceeds some critical value Dcr, a sharp broadening and shift of the ferromagnetic resonance line are observed at certain frequencies of the alternating magnetic field. Using a two-magnon scattering model, it is shown that these effects are caused by the scattering of spin waves on the inhomogeneous stochastic magnetic structure—magnetization ripple. An expression for the determination of the critical size Dcr is obtained. The micromagnetic simulation results agree with the main conclusions of the static and dynamic theories of magnetization ripple and also confirmed by experimental data reported by other authors.
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Держатели документа:
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 50/38 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Izotov, A. V.; Изотов, Андрей Викторович; Belyaev, B. A.; Беляев, Борис Афанасьевич; Solovev, P. N.; Соловьев, Платон Николаевич; Boev, N. M.; Боев, Никита Михайлович
}
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14.
Effect of helical
rolling on the bainitic
microstructure
and impact toughness of the low-carbon microalloyed steel / L. S. Derevyagina, A. I. Gordienko, N. S. Surikova, M. N. Volochaev> // Mater. Sci. Eng. A. - 2021. -
Vol. 816
. - Ст. 141275,
DOI
10.1016/j.msea.2021.141275. - Cited References: 43 . - ISSN 0921-5093
Кл.слова (ненормированные):
Low-carbon microalloyed steel
--
Helical rolling
--
Microstructure
--
Bainite
--
Martensite–austenite constituent
--
Impact toughness
Аннотация:
Ferrite-bainite microstructures and impact toughness of the X65 low-carbon microalloyed steel were investigated after helical rolling at 1000, 920, 850, and 810 °C followed by continuous cooling in air. After helical rolling at 1000 °C, granular bainite with large areas of the massive-shape martensite-austenite constituent (d = 1.5 μm) and a high fraction of twinned martensite (d › 2.0 μm) were observed in the steel. This caused a decrease in impact energy at low test temperatures (for example, 70 J at –70°С). Lowering the helical rolling temperature contributed to a reduction of dimensions of both ferrite-bainite and martensite-austenite constituent areas, as well as the replacement of the latter by a slender type one and an improvement in fracture toughness at the low temperatures. The highest impact energy level (210 J at –70 °C) was achieved after helical rolling at 850 °C due to the formation of a homogeneous
microstructure
, which included dispersed ferrite grains, granular bainite and small fractions of the slender type martensite-austenite constituent (d = 0.1–0.7 μm). In this case, areas of twinned martensite were absent.
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Держатели документа:
Institute of Strength Physics and Materials Science of Siberian Branch Russian Academy of Sciences, 2/4, Pr. Akademicheskii, Tomsk, 634055, Russian Federation
Kirensky Institute of Physics of the Siberian Branch of the Russian Academy of Sciences (SB RAS), Akademgorodok 50, Bld. 38, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, 31, Pr. Krasnoyarsk Worker, Krasnoyarsk, 660037, Russian Federation
Доп.точки доступа:
Derevyagina, L. S.; Gordienko, A. I.; Surikova, N. S.; Volochaev, M. N.; Волочаев, Михаил Николаевич
}
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15.
Comparison of the
microstructure
and magnetic properties of films and composite powders based on 3-d metal / E. A. Denisova, L. A. Chekanova, N. A. Shepeta, L. A. Kuzovnikova> //
4th International Baltic Conference on Magnetism (IBCM 2021) : Book of abstracts. - 2021. - P. 193. - Cited References: 1. - The research was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project number 20-43-240003.
Материалы конференции
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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS
Доп.точки доступа:
Denisova, E. A.; Денисова, Елена Александровна; Chekanova, L. A.; Чеканова, Лидия Александровна; Shepeta, N.A.; Kuzovnikova, L. A.; Кузовникова, Людмила Александровна; International Baltic Conference on Magnetism: focus on nanobiomedicine and smart materials(4 ; 2021 ; Aug. 29-Sept. 2 ; Svetlogorsk, Russia); Балтийский федеральный университет им. И. Канта
}
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16.
Effect of mechanical
activation on the thermoelectric properties of Sr1-xSmxTiO3 ceramics / Y. S. Orlov, S. N. Vereshchagin, S. V. Novikov [et al.]> // Ceram. Int. - 2021. -
Vol. 47
,
Is. 20
. - P. 28992-28999,
DOI
10.1016/j.ceramint.2021.07.060. - Cited References: 31. - This study was supported by the Russian Science Foundation, project no. 19-72-00097 . - ISSN 0272-8842. - ISSN 1873-3956
РУБ
Materials Science, Ceramics
Рубрики:
SRTIO3
LA
MICROSTRUCTURE
CONDUCTIVITY
PERFORMANCE
FIGURE
MERIT
Кл.слова (ненормированные):
Strontium titanate solid solutions
--
Thermoelectric oxide materials
--
Mechanochemical activation
Аннотация:
The Sr1-xSmxTiO3 (х = 0.025, 0.05, 0.075, 0.1, 0.2) strontium titanate solid solutions were prepared from oxides and carbonates using a conventional ceramic technology based on the mechanochemical activation. The electrical conductivity and Seebeck coefficient of the synthesized compounds were measured in the temperature range from 300 to 800 K. We found that the properties of the samples significantly depend on the preliminary mechanochemical activation. The thermoelectric power factor attains maximum value in the hydrogen reduced samples with concentration of х = 0.05 and 0.075 obtained from nanoparticles: 5.5 μW/(cm · K2) for Sr0.95Sm0.05TiO3 (580 K) and 4.10 μW/(cm · K2) for Sr0.925Sm0.075TiO3 (650 K). An increase in the annealing temperature of mechanically activated samples leads to an even greater increase in electrical conductivity and power factor: 9.2 μW/(cm · K2) for Sr0.925Sm0.075TiO3 (650 K).
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Держатели документа:
Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Inst Chem & Chem Technol, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk 660036, Russia.
Ioffe Inst, St Petersburg 194021, Russia.
Доп.точки доступа:
Orlov, Yu. S.; Орлов, Юрий Сергеевич; Vereshchagin, S. N.; Novikov, S., V; Burkov, A. T.; Borus, A. A.; Борус, Андрей Андреевич; Sitnikov, M., V; Solovyov, L. A.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Russian Science FoundationRussian Science Foundation (RSF) [19-72-00097]
}
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17.
Structural changes of
Co caused a change of the solution pH during chemical deposition / S. A. Podorozhnyak, A. V. Chzhant, V. K. Maltsevt [et al.]> // J. Sib. Fed. Univ. Math. Phys. - 2020. -
Vol. 13
,
Is. 4
. - P. 451-458 ; Журн. СФУ. Матем. и физика,
DOI
10.17516/1997-1397-2020-13-4-451-458. - Cited References: 10 . - ISSN 1997-1397. - ISSN 2313-6022
Перевод заглавия:
Структурные изменения кобальта, вызванные изменением pH при химическом осаждении
РУБ
Mathematics
Рубрики:
COBALT
MICROSTRUCTURE
Кл.слова (ненормированные):
Co-P films
--
chemical reduction of metals
--
induced magnetic anisotropy
--
nanocrystalline material
--
пленки Co-P
--
химическое восстановление металлов
--
наведенная магнитная анизотропия
--
нанокристаллический материал
Аннотация:
The phase transformations of the Co lattice are discussed, which determine the anomalous changes in the magnetic properties of chemically deposited Co-P films obtained at various pH values. The coercivity of the H-c films obtained at low pH values exceeds 1 kOe and decreases to several units Oe in the films obtained at high pH values. It is shown that the observed changes in the magnetic properties of Co-P films are caused by the transition of the cobalt crystal lattice to the nanocrystalline state.
Обсуждаются фазовые превращения решетки Co, которые определяют аномальные изменения магнитных свойств химически осажденных пленок Co-P, полученных при различных значениях pH. Коэрцитивная сила пленок, полученных при низких значениях pH, превышает 1 кЭ и снижается до нескольких единиц Э в пленках, полученных при высоких значениях pH. Показано, что наблюдаемые изменения магнитных свойств пленок Co-P вызваны переходом кристаллической решетки кобальта в нанокристаллическое состояние.
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Держатели документа:
Siberian Fed Univ, Krasnoyarsk, Russia.
Krasnoyarsk State Agr Univ, Krasnoyarsk, Russia.
RAS, Kirensky Inst Phys FIC KNC SB, Krasnoyarsk, Russia.
Доп.точки доступа:
Podorozhnyak, Sergey A.; Chzhant, Anatoly, V; Maltsevt, Vadim K.; Krayuhin, Ivan N.; Patrin, G. S.; Патрин, Геннадий Семёнович; Sakash, Irina Yu
}
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18.
Microstructure
of intercritical
heat affected zone and toughness of microalloyed steel laser welds / L. S. Derevyagina [et al.]> // Mater. Sci. Eng. A. - 2020. -
Vol. 770
. - Ст. 138522,
DOI
10.1016/j.msea.2019.138522. - Cited References: 28 . - ISSN 0921-5093
Кл.слова (ненормированные):
Low-carbon steel
--
Laser welding
--
Heat affected zone
--
Structure
--
Toughness
Аннотация:
Microstructure
of laser welds of the X70 low-carbon pipe steel was studied. High cooling rates after laser welding and non-uniform distribution of carbon in the ferrite-pearlite base metal caused formation of regions with increased microhardness (up to 650 НV) in inter-critical heat affected zone (ICHAZ). These regions consisted of finely dispersed degenerate upper bainite and martensite-austenite constituents of a slender shape and small fraction of a massive shape along the boundaries of bainite laths, as well as twinned martensite. High concentration of martensite-austenite constituents (10–16%) and residual stresses in ICHAZ, as well as a dendritic martensitic structure with carbide interlayers along the boundaries of martensite laths in fusion zone were the main reasons of sharp decrease in charpy impact energy of the welded samples. High microhardness of the laser welds was decreased down to 320 HV and their brittleness was improved by annealing. Also, in ICHAZ, degenerate upper bainite and the regions of martensite-austenite constituents decayed forming tempered sorbite and Fe2C and Fe3C carbides, respectively. Charpy impact energy of the welds doubled after annealing compared to the welds without annealing, and ductile-brittle transition temperature decreased down to –60°С.
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Держатели документа:
Institute of Strength Physics and Materials Science of Siberian Branch Russian Academy of Sciences, 2/4, pr. Akademicheskii, Tomsk, 634055, Russian Federation
Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences, 4/1, Institutskaya str., Novosibirsk, 630090, Russian Federation
Kirensky Institute of Physics of the Siberian Branch of the Russian Academy of Sciences (SB RAS), Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Derevyagina, L. S.; Gordienko, A. I.; Orishich, A. G.; Malikov, N. S.; Surikova, M. N.; Volochaev, M. N.; Волочаев, Михаил Николаевич
}
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19.
The effect of
the initial
microstructure
of the X70 low-carbon microalloyed steel on the heat affected zone formation and the mechanical properties of laser welded joints / A. I. Gordienko, L. S. Derevyagina, A. G. Malikov [et al.]> // Mater. Sci. Eng. A. - 2020. -
Vol. 797
. - Ст. 140075,
DOI
10.1016/j.msea.2020.140075. - Cited References: 32. - Microstructural studies and mechanical tests of laser welds were performed within the frame of the Fundamental Research Program of the State Academies of Sciences for 2013?2020, line of research III.23.1.1. Part of the research related to the selection of optimal laser welding parameters for low carbon steels was carried out within Basic State Project No. AAAA-A17-117030610122-6. TEM studies were carried out in Center of Federal Research Center of Kirensky Institute of Physics SB RAS. The authors are grateful to I.P. Mishin. for assistance in cross-helical rolling of the steel . - ISSN 0921-5093
Кл.слова (ненормированные):
Low-carbon steel
--
Cross-helical rolling
--
Laser welding
--
Heat affected zone
--
Bainite
--
Microhardness
Аннотация:
In this paper, the heat affected zone (HAZ) of laser welded joints of the X70 steel were studied by the transmission electron microscopy method. The effect of the initial
microstructure
(coarse-grained hot-rolled and fine-grained after cross-helical rolling) on the HAZ formation and the mechanical characteristics of the welded joints were shown. It was found that the
microstructure
in the inter-critical HAZ of the steel after cross-helical rolling was more dispersed, homogeneous, and uniform compared to that of the coarse-grained hot-rolled one due to the initial fine-grained ferrite-bainitic-pearlite
microstructure
and the absence of pronounced ferrite-pearlite banding in the base metal. The character of the microhardness value distribution in the HAZ of the steel after cross-helical rolling was smooth with the gradual decrease from 370 down to 185 HV as shifted towards the base metal. In the HAZ of the coarse-grained hot-rolled steel, the heterogeneous microhardness value (up to 640–670 НV) distribution was revealed. The reason was the upper degenerate bainite
microstructure
with high residual stresses, characterized by laths up to 2.0–2.5 μm long and a high martensitic-austenitic constituent fraction (10–16%) of a slender shape along the boundaries of bainite laths. The conclusion was drawn that one of the ways to reduce the brittleness of the laser welded joints could be using the initially fine-grained steels possessing the homogeneous (mainly bainitic)
microstructure
.
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Держатели документа:
Institute of Strength Physics and Materials Science of Siberian Branch Russian Academy of Sciences, 2/4, Pr. Akademicheskii, Tomsk, 634055, Russian Federation
Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences, 4/1, Institutskaya str., Novosibirsk, 630090, Russian Federation
Kirensky Institute of Physics of the Siberian Branch of the Russian Academy of Sciences (SB RAS), Akademgorodok 50, bld. 38, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, 31, Pr. Krasnoyarsk worker, Krasnoyarsk, 660037, Russian Federation
Доп.точки доступа:
Gordienko, A. I.; Derevyagina, L. S.; Malikov, A. G.; Orishich, A. M.; Surikova, N. S.; Volochaev, M. N.; Волочаев, Михаил Николаевич
}
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20.
The effect of
high-temperature and high-stress martensite aging on martensitic transformation and
microstructure
of Ti-51.5 at % Ni single crystals / E. E. Timofeeva, E. Yu. Panchenko, A. S. Eftifeeva [et al.]> //
AIP Conf. Proc. - 2020. -
Vol. 2310
. - Ст. 020336
DOI
10.1063/5.0034595. - Cited References: 9. - The study was supported by the Russian Science Foundation (grant No. 18-19-00298)
Аннотация:
In this work, the thermomechanical stability of heterophase [001]-oriented Ti–51.5 at % Ni single crystals was investigated. Experiments include a high-temperature and high-stress martensite ageing and also loading/unloading cycling at superelasticity (SE) during forward and reverse B2-B19′ martensitic transformations (MT). It was found that Ti–51.5 at % Ni single crystals containing large Ti3Ni4 particles (d ∼ 600 nm after ageing at 850 K for 1 h) is not resistant to stress-assisted martensite ageing and cycling. Stress-assisted martensite ageing at 423 K, 1.7–2 GPa, for 2–4 h leads to the deformation of large Ti3Ni4 particles, the appearance of dislocations at the particle-matrix boundaries, an increase in MT temperatures (by 10 K), and a strong diffusion of the MT (the intervals of forward and reverse MT Δσ1 and Δσ2 increase in 2 times). During loading/unloading cycling at 423 K and 1.0–2.0 GPa single crystals with large particles were destroyed after 20–25 cycles. It is possible to increase the thermomechanical stability due to the additional precipitation of nanosized Ti3Ni4 particles (d‹30 nm by ageing at 673 K, 1 h), which appear in the B2 matrix between large particles. In such crystals with a bimodal structure no changes in the
microstructure
and functional properties were observed after stress-assisted martensite ageing and loading/unloading cycling.
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Держатели документа:
Siberian Physical-Technical Institute, National Research Tomsk State University, Tomsk, 634050, Russian Federation
Kirensky Institute of Physics, Federal Research Center, KSC Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Timofeeva, E. E.; Panchenko, E. Yu.; Eftifeeva, A. S.; Yanushonite, E. I.; Zherdeva, M. V.; Chumlyakov, Yu. I.; Volochaev, M. N.; Волочаев, Михаил Николаевич; International Conference on Physical Mesomechanics. Materials with Multilevel Hierarchical Structure and Intelligent Manufacturing Technology 2020(5 - 9 October 2020 ; Tomsk, Russian Federation)
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