(长春大学机械学院，长春 13002)
摘 要: 依据固体与分子经验电子理论提出了金属间化合物价电子结构的空间分布模型，据此分析了TiAl的脆性本质。结果表明，TiAl脆性是由于其 Nl 太小而 N 较大引起的。同时表明，该模型与其它从电荷密度出发的电子理论研究相比, 处理方法简单且物理意义明确。
关键字: 金属间化合物 价电子结构 电荷密度 空间分布模型
（College of Mechanical Engineering, Changchun University, Changchun 130022, P. R. China）
Abstract:According to the empirical electron theory of solids and molecles(EET), the space topology model of valence electron structure in intermetallies was proposed, and embrittlement nature of TiAl was analysed by the model. The result is that the embrittlement of TiAl results from its low Nl and high N. Compared with other electron theory studies by charge density, the application of the model is simpler and has clearer physical meaning as well.
Key words: intermetallics; valence electron structure; charge density; space topology model
