关键词: TiC/Fe复合材料, 原位合成, 钛铁矿, 热力学过程, 合成条件

Abstract: TiC/Fe Composite was produced by In-Situ Carbothermic Reduction and Synthesis methods. Ilmenite, a
natural mineral was used as the main raw material. Synthesis and sintering were accomplished unifiedly in vacuum resistance furnace. The main purpose of the
study was to explore a new method to synthesize the advanced TiC/Fe composites with relatively lower cost. The whole thermodynamics process
was analyzed and investigated not only in theory but also through experiments. The synthesis conditions of the product were also discussed.
The study shows that the reaction formation principles of TiC are as following: firstly, FeTiO_3 is reduced by carbon and it forms into Ti_xO^_y
and Fe; secondly, Ti_xO_y continuously reacts with carbon, and oxygen can be reduced out step by step, until the formation of TiC; the growth process of
TiC---firstly TiC_x with enough Ti and short C can be formed, then TiC^_x and C formed into TiC which is approximate the chemical meter
mount proportion. The sintering temperature zone is between 1500-1600℃, with the increase of temperature, the hardness and the relative density are also enhanced. Adding Mo can improve the
interfacial bonding between the metal and TiC. Some residual carbon exists in the reaction product.

Key words: TiC/Fe composite, in-Situ synthesis, ilmenite, thermodynamics process, synthesis conditions