Al_2O_3+TiC陶瓷中Al_2O_3与TiC化学反应抑制的研究

Inhibition of Chemical Reaction between Al 2O 3 and TiC in Al 2O 3+TiC Ceramics

本文通过Ｙ－盐溶液的形式加入到Ａｌ２Ｏ３粉料中，制备了Ｙ２Ｏ３在Ａｌ２Ｏ３表面固溶的Ａｌ２Ｏ３粉料，对其阻止Ａｌ２Ｏ３与ＴｉＣ之间的化学反应进行了研究。研究结果表明：采用Ｙ－盐溶液加入Ｙ２Ｏ３，Ｙ原子能均匀的分散在Ａｌ２Ｏ３的表面，高温时Ｙ２Ｏ３在Ａｌ２Ｏ３表面形成固溶体层，少量的Ｙ２Ｏ３加入量（０．３５ｗｔ％），就能有效的阻止Ａｌ２Ｏ３与ＴｉＣ之间的化学反应。

In this paper,the inhibition of chemical reaction between Al 2O 3 and TiC was studied with Y-salt solution introduced in Al 2O 3 powder.It was shown that Y 2O 3 in form of Y-salt introduced into Al 2O 3 has better effect than Y 2O 3 powder.With only 0.35wt% Y 2O 3 as Y-salt added,the reaction between Al 2O 3 and TiC can be inhibited.