(長(zhǎng)春大學(xué)機(jī)械學(xué)院，長(zhǎng)春 13002)
摘 要: 依據(jù)固體與分子經(jīng)驗(yàn)電子理論提出了金屬間化合物價(jià)電子結(jié)構(gòu)的空間分布模型，據(jù)此分析了TiAl的脆性本質(zhì)。結(jié)果表明，TiAl脆性是由于其 Nl 太小而 N 較大引起的。同時(shí)表明，該模型與其它從電荷密度出發(fā)的電子理論研究相比, 處理方法簡(jiǎn)單且物理意義明確。
關(guān)鍵字: 金屬間化合物 價(jià)電子結(jié)構(gòu) 電荷密度 空間分布模型
（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
