Regularities of the contact interaction of titanium carbide with Ni and Ni–Mo melts

Zhilyaev, V.A.; Patrakov, E.I.; Fedorenko, V.V.

Авторы: Zhilyaev V.A., Patrakov E.I., Fedorenko V.V.
Журнал: Russian Journal of Non-Ferrous Metals
Том: 57
Номер: 3
Год издания: 2016
Первая страница: 243
Последняя страница: 250
DOI: 10.3103/s1067821216030159
Аннотация: Regularities of the dissolution, the phase formation, and the structure formation implemented under the contact interaction conditions of titanium carbide of various compositions with Ni and Ni–(5–25%)Mo melts are investigated. It is originally established that the dissolution of carbide TiCx in nickel-based melts is incongruent. Preferentially, carbon transfers into the melt at x ≥ 0.9 and titanium at x ≤ 0.8. The limiting stage of the dissolution is diffusion of metal atoms in the liquid phase. The formation regularities of carbide Ti1 – nMonCx (K-phase) — the main product of the contact interaction in the TiC/Ni–Mo system are revealed. It is established that the K-phase is formed under the relative excess conditions of the Ni–Mo melt preferentially according to the dissolution–isolation mechanism. The composition of autonomous isolations of the K-phase depending on the experimental conditions (1450°C, 0–25 h) varies in limits from Ti0.4Mo0.6C0.7 (a = 4.27 Å) to Ti0.7Mo0.3C0.6 (a = 4.29 Å). It is determined by the molybdenum concentration in the melt at the unsteady dissolution stage and by the concentration ratio between titanium and carbon in it at the steady-state dissolution stage. Keywords: titanium carbide, Ni–Mo melt, interaction, reactions, K-phase, microstructure
Добавил в систему: Патраков Евгений Иванович

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