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티타늄 성형체와 탄화수소가스 반응에 의한 티타늄 복합 재료의 합성
김용현,김용진,양동완,이성규,안재환,정형식 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.2
Titanium-base composites with TiC particulates were synthesized by reacting mixed elemental titanium alloy powder compacts with hydrocarbon gas such as propane gas, and sintered in a vacuum. Titanium carbide was formed as a thin layer around the surface of each titanium particle in the compact during the reaction. Various transient carbides and hydride were also formed during the reaction but completely disappeared during the high temperature vacuum sintering, leaving only titanium carbide globules. The density and structure of the sintered composites were significantly affected by the initial titanium powder size and the reaction parameters. The volume percent of the titanium carbide could be precisely controlled by adjusting the reaction temperature and time. The rate of titanium carbide formation increases with the reaction temperature but shows parabolic behavior with time. Based on the results, a model for the titanium carbide formation inside a titanium powder compact was proposed.