中文摘要：

TiAl/Ti_2AlC composites 被准备由在原处，在不同温度的 Ti/Al/Cpowders 混合物和 sintered 的热压被 X- 调查 -- 样品的光线衍射(XRD ) 。Ti-Al-C 系统的反应过程能被划分成三个阶段。Below900 deg 6 号元素碳的化学符号， Ti 与艾尔一起反应形成 TiAl interme-tallics；在 900 deg 6 号元素碳的化学符号上面， 6 号元素碳的化学符号与 remainTi 反应形成 Ti 和艾尔的 exothermal 触发的 TiC；TiAl 与 TiC 反应生产稠密的 TiAll Ti_2 AlC composites。在成立阶段，第三的 Ti_2 AlC 同时发展到分层的多晶体和 composites pyknosis。特别讨论的合成和 mierostructurewas 的机制。

英文摘要：

TiAl/Ti2AlC composites were prepared by in-situ hot pressing of TilAl/C powders mixtures and sintered at different temperatures were investigated by X- ray diffraction （ XRD ） of samples. The reaction procedure of Ti-Al-C system could be divided into three stnges. Below 900℃ , Ti reacts with Al to form TiAl intermetallics ; above 900 ℃ , C reacts with remain Ti to form TiC triggered by the exothermal reaction of Ti and Al ; TiAl reacts with TiC to produce dense TiAl/Ti2AlC compasites.In the holding stage, ternary Ti2AlC develops to layered polycrystal and composites pyknosis in the meanwhile. The mechanism of synthesis and microstructure was especially discussed.