【摘要】 以天然矿物钛铁矿 (FeTiO3)、C(石墨 )为原料 ,采用原位碳热还原法 ,实现合成与烧结一体化 ,真空烧结制备TiC/Fe复合材料 ,探索了一条低成本合成高性能TiC/Fe复合材料的新途径 .对反应的热力学过程进行理论分析和实验研究 ,分析了产物的结构、组织和性能 .研究表明 :反应产物主要存在两相 ,即TiC相和Fe的固溶相 ,球形的TiC颗粒相被包围在网状结构的Fe及Fe合金粘结相中 ,TiC颗粒尺寸均匀 ,大小约 2～ 5 μm .Mo的加入可以改善金属相对TiC的润湿性 .产物中有少量游离碳存在更多还原

【Abstract】 The main purpose of the study is to explore a new method to synthesize advanced TiC/Fe composites with relatively low cost. TiC/Fe composite was produced by in_situ carbothermic reduction and synthesis method from ilmenite, the main raw material. Synthesis and sintering were accomplished unitedly in vacuum resistance furnace. The whole thermodynamics process was analyzed both in theory and by experiment. The composition, microstructure and properties of the products were also examined. The results show that cermet mainly consists of TiC particles and Fe-binder. Spheroidal TiC particles have a narrow size distribution (about 2～5 μm) and are enveloped by continuous Fe-binder phase. Adding Mo can improve the interfacial bonding between the metal phase and TiC. Some residual carbon is found existing in the reaction product.更多还原