中文摘要：

选择 Ti- C- Al 和 Ti- C- Al- CuO 两种体系,采用原位反应近液相线铸造技术,制备铝基复合材料。通过金相显微镜、扫描电镜和 X 射线衍射仪研究了复合材料的微观组织。对上述两种体系的反应进行了热力学与动力学分析。进一步研究了CuO 对 Ti- C- Al 体系的自蔓延反应过程的作用机理,建立了其反应过程的动力学模型。结果表明：在 Ti- C- Al 体系自蔓延反应过程中,CuO 和 Al 的反应可以提高其反应体系的绝热温度,能为该体系反应持续提供热量,使其自蔓延效果更为显著,反应更加彻底,大大减少条块状的中间产物 Al3 Ti,优化了材料组织。

英文摘要：

Aluminum matrix composites were prepared using an in-situ reactive near-liquidus casting technique in two systems of Ti-C-Al and Ti-C-Al-CuO. Their microstructure was studied by optical microscopy, scanning electron microscopy and X-ray diffraction. Thermodynamic analysis on the reaction in the two systems was carried out. The effect of CuO on the self-propagating reaction process of the Ti-C-Al system was discussed, and a kinetic model was set up. It is found that in the self-propagating reaction process of the Ti-C-Al system, the reaction between CuO and Al is able to enhance the adiabatic temperature of the system and provide the system with sustaining heat, making the self-propagating reaction more remarkable and more completed. As a result, blocky Al3 Ti mesophase is ex-tremely decreased, and the microstructure of the composites is optimized.