摘要
利用场激发反应热压合成技术研究了Al-Ti-C混合粉末体系制备TiC/Al产物的过程与致密性,并结合DSC实验分析了该体系合成TiC相的形成途径。结果表明,采用反应热压合成法完全能够制备较致密的TiC/Al复合材料。该体系形成TiC相的反应过程为:Ti(s)+3Al(s)=TiAl3(s)→Al(s)=Al(l)→Ti(s)+3Al(l)=TiAl3(s)→TiAl3(s)=TiAl3(l)→TiAl3(l)+C(s)=TiC(s)+Al(l)。混合粉末中的Al不仅作为稀释剂降低体系的反应温度而细化TiC晶粒,还作为反应剂参与了整个反应进程。
Utilizing the field activation reactive hot-pressing （RHP） technology, the process and densification of TiC/AI products obtained from A1-Ti-C mixtures system were investigated, coupled with the DSC experiment to analyze the lbrmation path of TiC phase in this system. The results show that the dense TiC/A1 composite can be fully fabricated by the reactive hot-pressing method. The reaction process of the A1-Ti-C system to form TiC phase can be expressed： Ti（s）＋3Al（s）= TiA13（s） →Al（s）=Al（1）→Ti（s）＋3Al（1）=TiAla（s）→TiA13（s）=TiA13（1）→TiA13（1）＋C（s）=TiC（s）＋Al（l）. Al in the mixtures plays an important role in serving not only as a diluent to decrease the reaction temperature and thus to refine the TiC grains, but also as an intermediate reactant to participate in the whole reaction process.
出处
《热加工工艺》
CSCD
北大核心
2012年第8期92-95,共4页
Hot Working Technology
基金
贵州省科研条件特助经费资助项目(TZJF2010040)
铜仁学院科研基金资助项目(DS1102)
