Isothermal sections of the Co-Re-Ta phase diagram at 1200 and 1375 KстатьяИсследовательская статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 23 августа 2019 г.
Аннотация:Isothermal sections of the Co-Re-Ta system were constructed at 1375 K and 1200 K by investigations of equilibrated
alloys using electron probe microanalysis (EPMA), scanning electron microscopy (SEM), powder X-ray
diffraction (PXRD) and differential thermal analysis (DTA). In the Co-Re-Ta system at 1375 K, the existence of
five three-phase equilibria (γСо+λ+μ), (γСо+μ+(Re)), (μ+χ+(Re)), (βTa+μ+χ) and (βTa+μ+Ta2Co) has
been established and the existence of three-phase equilibrium (γСо+λ+λ′) has been assumed. In the Co-Re-Ta
system at 1200 K, the existence of six three-phase equilibria (γСо+λ′+Co3Ta), (γСо+λ+μ), (γСо+μ+(Re)),
(μ+χ+(Re)), (βTa+μ+χ) and (βTa+μ+Ta2Co) has been established and the existence of two more three-phase
equilibria (γСо+λ+λ′) and (λ+λ′+Co3Ta) has been assumed. The Laves phase λ′ is a ternary phase at 1200 K
and crystallizes with the MgNi2-type of the crystal structure.