A new theoretical study of the Cr-Nb systemстатья
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Дата последнего поиска статьи во внешних источниках: 7 октября 2020 г.
Авторы:
Schmetterer C. ,
Khvan A. ,
Jacob A. ,
Hallstedt B. ,
Markus T.
Журнал:
Journal of Phase Equilibria and Diffusion
Том:
35
Номер:
4
Год издания:
2014
Издательство:
ASM International
Местоположение издательства:
United States
Первая страница:
434
Последняя страница:
444
DOI:
10.1007/s11669-014-0313-y
Аннотация:
A new thermodynamic assessment of the binary Cr-Nb system was performed using the CALPHAD method based on a review of the available literature and ab initio calculations for the hypothetical end members of the C15 Laves phase. Recent experiments reported in the literature revealed that there is no C14 type high temperature phase in this system, which is in contrast to most of the literature. A thorough analysis of these reports, however, showed that the C14 phase has never been directly observed and that its presence had been derived from ternary phase diagram data, twinning of the C15 low temperature phase and erroneous interpretations of x-ray diffractograms. Due to the lack of clear evidence in favor of its existence, the C14 phase was not considered a thermodynamically stable compound in the present evaluation. © 2014 ASM International.
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Хван Александра Вячеславовна
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