powderИзвестия вузов. Порошковая металлургия и функциональные покрытияPowder Metallurgy аnd Functional Coatings (Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional'nye Pokrytiya)1997-308X2412-8767НИТУ "МИСИС"10.17073/1997-308X-2015-3-25-35powder-137Research ArticleТугоплавкие, керамические и композиционные материалыRefractory, Ceramic, and Composite MaterialsЗакономерности контактного взаимодействия двойных карбидов (Ti1–nMen IV,V)C с Ni–Mo-расплавомRegularities of the Contact Interaction of Binary Carbides (Ti1–nMen IV,V)C with the Ni–Mo meltЖиляевВ. А.ZhilyaevV. A.

докт. техн. наук, канд. хим. наук, вед. науч. сотрудник ИХТТ УрО РАН (620990, г. Екатеринбург, ул. Первомайская, 91). Тел.: (343) 362-35-24.

zhilyaev@ihim.uran.ruПатраковЕ. И.PatrakovE. I.

канд. хим. наук, ст. науч. сотрудник ИФМ УрО РАН (620990, г. Екатеринбург, ул. С. Ковалевской, 18).

patrakov@imp.uran.ruИнститут химии твердого тела (ИХТТ) УрО РАН, г. ЕкатеринбургRussian FederationИнститут физики металлов (ИФМ) УрО РАН, г. ЕкатеринбургRussian Federation201514092015032535Copyright © НИТУ "МИСИС", 20152015НИТУ "МИСИС"НИТУ "МИСИС"https://powder.misis.ru/jour/about/submissions#copyrightNoticehttps://powder.misis.ru/jour/article/view/137

Методами рентгеноспектрального микроанализа и растровой электронной микроскопии впервые систематически изучены закономерности процессов растворения, фазо- и структурообразования, протекающих при взаимодействии двойных карбидов (Ti1–nMen IV,V)С с Ni–25%Mo-расплавом (t = 1450 °C, τ = 1 ч, вакуум 10–1 Па). Выяснена роль каждого легирующего металла в процессах формирования состава и микроструктуры исследованных композиций. Установлено, что легирующие металлы IV группы (Zr и Hf) практически не входят в состав образующейся K-фазы (карбида Ti1–nMonCх), поэтому отсутствует зависимость ее состава от их концентрации в двойном карбиде. В отличие от циркония и гафния легирующие металлы V группы (V и Nb) активно участвуют в процессе формирования K-фазы, однако зависимости состава K-фазы и металлической матрицы от содержания ванадия и ниобия в исходном карбиде носят в этом случае противоположный характер. Предложено объяснение причин этих отличий.

Regularities of dissolution, phase formation, and structure formation in the course of the interaction of double carbides (Ti1–nMenIV,V)C with Ni–25%Mo melt (t = 1450 °C, τ = 1 h, vacuum 10–1 Pa) are for the first time investigated by electron probe microanalysis and scanning electron microscopy. The role of each alloying metal in the formation of the composition and microstructure of studied compositions is revealed. It is established that alloying Group IV metals (Zr and Hf) almost do not enter the composition of the formed K-phase (carbide Ti1–nMonCх); therefore, its composition is independent of their concentration in double carbide. In contrast with zirconium and hafnium, alloying metals of Group V (V and Nb) actively participate in the formation of the K-phase; however, the dependences of the composition of the K-phase and metal matrix on the vanadium and niobium content in initial carbide have the opposite character in this case. The explanation of the causes of these distinctions is proposed.

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