摘要
对采用ＤＳＣ、ＸＲＤ和ＳＥＭ３种方法分别由Ｔｉ和ＴｉＨ２粉末与Ａｌ粉末（５２％Ｔｉ和４８％Ａｌ）反应合成ＴｉＡｌ合金的过程及其机理进行了分析和探讨。Ｔｉ与Ａｌ，ＴｉＨ２与Ａｌ均需在Ａｌ转化为液态后才能进行剧烈的反应，但ＴｉＨ２与Ａｌ的反应是由ＴｉＨ２脱氢所产生的高活性Ｔｉ参与的，因而它们反应较完全，生成的ＴｉＡｌ相对量较高。随着反应的进行及Ａｌ元素的均匀化，反应初期生成的较不稳定的ＴｉＡｌ３相和αＴｉ相将消失。
The procedure of synthesing TiAl alloy by reaction of Ti and TiH2 powders with Al powder (52%Ti and 48%Al) was studied with DSC, XRD and SEM. Intense reactions of Ti with Al and TiH2 with Al would take place after Al element become melten. However, the reaction of TiH2 with Al is more complete, obtaining a higher amount of TiAl, because highly active Ti produced by decomposition of TiH2 participates in the reaction. With the development of the reaction and the homogenization of Al elements, less stable TiAl3 and αTi phases produced at the early stage of the reaction will disappear and the resultant from the reaction consists mainly of TiAl and less Ti3Al phases.
出处
《矿冶工程》
CAS
CSCD
北大核心
1997年第3期75-78,共4页
Mining and Metallurgical Engineering
