Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Nikolay A. Dormidontov"'
Autor:
Mark V. Zheleznyi, Natalia B. Kolchugina, Vladislav L. Kurichenko, Nikolay A. Dormidontov, Pavel A. Prokofev, Yuriy V. Milov, Aleksandr S. Andreenko, Ivan A. Sipin, Andrey G. Dormidontov, Anna S. Bakulina
Publikováno v:
Crystals, Vol 13, Iss 2, p 177 (2023)
The finite element micromagnetic simulation is used to study the role of complex composition of 2:17R-cell boundaries in the realization of magnetization reversal processes of (Sm, Zr)(Co, Cu, Fe)z alloys intended for high-energy permanent magnets. A
Externí odkaz:
https://doaj.org/article/906acfe874a24e6d9b8fe9f9623aa7dd
Autor:
Nataliya B. Kolchugina, Katerina Skotnicova, Aleksander A. Lukin, Gennadii S. Burkhanov, Ondrej Zivotsky, Miroslav Kursa, Nikolay A. Dormidontov, Pavel A. Prokofev, Yuri S. Koshkiďko, Tomas Cegan, Tatiana P. Kaminskaya, Boris A. Ginzburg
Publikováno v:
AIP Advances, Vol 9, Iss 12, Pp 125025-125025-5 (2019)
We have investigated the effect of HoH2 hydride addition on the hysteresis loop parameters of sintered Pr-Fe-Ti-Al-Cu-B magnets. The magnets were prepared by traditional powder metallurgy technology, and 3 wt.% HoH2 was added to the powder at the fin
Externí odkaz:
https://doaj.org/article/575cd3ba80d74384af5423d601ca72a7
Autor:
Andrey G. Dormidontov, Natalia B. Kolchugina, Nikolay A. Dormidontov, Mark V. Zheleznyi, Anna S. Bakulina, Pavel A. Prokofev, Aleksandr S. Andreenko, Yury V. Milov, Nikolay N. Sysoev
Publikováno v:
Materials, Vol 14, Iss 24, p 7762 (2021)
Observations of the surface domain structure (Kerr-effect), optical metallography, scanning electron microscopy (SEM-SE), and electron microprobe analysis (EPMA-SEM), measurements of major and minor magnetic hysteretic loops were used to study pseudo
Externí odkaz:
https://doaj.org/article/3410a4511c0c4b5482549134db4d0e61
Autor:
Andrey G. Dormidontov, Natalia B. Kolchugina, Nikolay A. Dormidontov, Yury V. Milov, Alexander S. Andreenko
Publikováno v:
Materials, Vol 13, Iss 23, p 5426 (2020)
Experimental series of alloys for (Sm,Zr)(Co,Cu,Fe)Z permanent magnets are presented in the concentration ranges that provide wide variations of (4f)/(4d)/(3d) ratios of comprising elements. Optical metallographic analysis, observation of the surface
Externí odkaz:
https://doaj.org/article/0abd054c0691424b8e4aa8adeb0400a0
Publikováno v:
Materials, Vol 13, Iss 17, p 3893 (2020)
An original vision for the structural formation of (Sm,Zr)(Co,Cu,Fe)Z alloys, the compositions of which show promise for manufacturing high-coercivity permanent magnets, is reported. Foundations arising from the quantitative analysis of alloy microst
Externí odkaz:
https://doaj.org/article/e119fd0f9f504d4288ed1fb2899fb1cc
Autor:
Pavel A. Prokofev, Natalia B. Kolchugina, Katerina Skotnicova, Gennady S. Burkhanov, Miroslav Kursa, Mark V. Zheleznyi, Nikolay A. Dormidontov, Tomas Cegan, Anna S. Bakulina, Yurii S. Koshkidko, Bedřich Smetana
Publikováno v:
Materials, Vol 13, Iss 14, p 3049 (2020)
The wide application of Nd-Fe-B permanent magnets, in addition to rare-earth metal resource constraints, creates the necessity of the development of efficient technologies for recycling sintered Nd-Fe-B permanent magnets. In the present study, a magn
Externí odkaz:
https://doaj.org/article/02550a6eeb8c44deb1bbcf347a929088
Publikováno v:
Inorganic Materials: Applied Research. 12:491-498
Processes of the formation of the high-coercivity state of the Sm0.85Zr0.15(C00.702Cu0.088Fe0.210)z alloys with different indices z = 6.0, 6.5, and 6.8, which characterize the (4f-,4d-)-to-(3d-) element ratio, are studied. Correlations between the ch
Autor:
S. V. Gorbunov, N. R. Roshan, Nikolay A. Dormidontov, A. S. Bakulina, D. A. Rusinov, T. P. Kaminskaya, G. S. Burkhanov, Natalia B. Kolchugina
Publikováno v:
Physics of Metals and Metallography. 122:54-59
The purity of hydrogen, which is an alternative energy carrier in powder sources of distributed energy resource systems and, in particular, is the feed stock for fuel cells, should be no less than 99.9999 vol % purity High-purity hydrogen can be prep
Autor:
T. P. Kaminskaya, Pavel A. Prokofev, B. A. Ginzburg, A. A. Lukin, Kateřina Skotnicová, A. S. Bakulina, M. V. Zelezhnyi, Miroslav Kursa, Tomáš Čegan, Nikolay A. Dormidontov, G. S. Burkhanov, Natalia B. Kolchugina
Publikováno v:
Physics of Metals and Metallography. 121:772-782
X-ray diffraction analysis, scanning electron microscopy, and atomic force microscopy are used to study the phase composition, texture, and peculiarities of the morphology of R–Fe–B (R = Nd, Pr, Dy) alloys prepared by strip-casting technology. Al
Autor:
G. S. Burkhanov, Natalia B. Kolchugina, Nikolay A. Dormidontov, A. G. Dormidontov, Yu. V. Milov
Publikováno v:
Inorganic Materials: Applied Research. 10:662-665
Correlation between the morphology, magnetic properties of powdered (Sm, Zr)(Co, Cu, Fe)z alloy, and magnetic characteristics of magnets made of these powders has been established. Monotonic variations of average particle sizes and density of ready-m