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中文摘要：
采用超重力下自挤压辅助燃烧合成技术,以快速凝固方式制备出TiC-（Ti,W）C1-x基细晶复合陶瓷。XRD、FESEM与EDS结果表明,TiC基复合陶瓷基体主要由球状的TiC细晶构成,同时在TiC-（Ti,W）C1-x基体间还分布着少量的TiB2片晶、（Cr,W,Ti）3B2及Al2O3残余夹杂物。由于超重力的引入,促使液态产物分层,且因处于底部的Ti-W-Cr-C-B液相中Ti、C原子浓度高,使得TiC率先形核并快速生长,从而促进ε（Ti,W）C1-x生长发育,最终生成TiC-（Ti,W）C1-x基陶瓷。性能测试表明陶瓷相对密度和硬度分别为99.3%与22.5±1.5 GPa。
英文摘要：
By using self-pressing assisted combustion synthesis under high gravity,fine-grained TiC-（Ti,W）C1-x matrix ceramics were achieved through rapid solidification.XRD,FESEM and EDS results show that TiC-（Ti,W）C1-x matrix ceramics are mainly composed of spherical fine TiC grains,and in the matrix there distribute a few TiB2,（Cr,W,Ti）3B2 and residual Al2O3 inclusions.because of the introduction of high gravity,the molten products from combustion reaction are layered.As a result of high concentration of Ti and C in Ti-W-Cr-C-B liquid at the bottom of the melt,TiC solids nucleate and grow rapidly as the primary phase,leading to the formation of ε（Ti,W）C1-x solids and the development of TiC-（Ti,W）C1-x matrix microstructures.Mechanical properties show that relative density and Vickers hardness of the ceramics are 99.3% and 22.5±1.5 GPa respectively.
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