论文部分内容阅读
以Ti粉和Al粉为原料,并添加不同含量CuO粉体进行掺杂,经真空热压烧结制得了TiAl基复合材料。结合热分析,X射线衍射分析及扫描电镜分析对该体系的反应合成过程及CuO添加量对产物微结构的影响进行研究。结果表明:Al熔化后分别对Ti、CuO颗粒润湿并发生反应,热压反应温度在800℃时,生成了Al3Ti中间产物。热压烧结温度达到1000℃时,合成了由TiAl,Al2O3,Al6.1Cu1.2Ti2.7三种物相组成的复合材料。其基体主要由TiAl和Al6.1Cu1.2Ti2.7两相组成,增强相Al2O3为Al-CuO置换反应生成,且其颗粒细小,主要分布在基体相周围。Al6.1Cu1.2Ti2.7、Al2O3相含量随原料中CuO添加量不同而呈规律性变化。
Using Ti powder and Al powder as raw materials, and adding different content of CuO powder for doping, TiAl matrix composite material was obtained by vacuum hot-pressing sintering. The effects of the reaction process and CuO addition on the microstructure of the product were investigated by means of thermal analysis, X-ray diffraction analysis and scanning electron microscopy. The results show that after melting Al, the Ti and CuO particles wet and reacts respectively. When the hot pressing temperature is 800 ℃, the Al3Ti intermediate product is formed. When the hot pressing sintering temperature reaches 1000 ℃, a composite material composed of three phases of TiAl, Al2O3, Al6.1Cu1.2Ti2.7 was synthesized. The matrix is mainly composed of two phases of TiAl and Al6.1Cu1.2Ti2.7, and the enhanced phase Al2O3 is generated by Al-CuO substitution reaction, and the particles are small and mainly distributed around the matrix phase. Al6.1Cu1.2Ti2.7, Al2O3 content with the amount of CuO added in the raw material showed a regular change.