用Friedman法研究了非等温DSC条件下燃烧合成反应Ti+3Al→TiAl3的复杂反应动力学.该合成反应并非单步合成反应,而是有中间相TiAl出现的多步反应.它包含三个子过程,其激活能分别为109,175和89 kJ/mol.控制反应速度的这三个过程分别对应反应初期的Ti(固)和Al(液)间的直接反应、中期的Ti-Al扩散偶中Al通过TiAl3层的扩散以及反应后期的TiAl-Al扩散偶中Al通过TiAl3层的扩散.
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