金属间化合物非配比现象的模式识别分析

NON STOICHIOMETRY OF INTERMETALLIC COMPOUNDS STUDIED BY PATTERN RECOGNITION METHOD

非配比现象就是许多金属间化合物的组成在一定范围内可变。为更好地预报合金相图，该文根据扩充的Ｍｉｅｄｅｍａ合金元胞模型，用ΔΦ、Δｎ１／３ｗｓ以及ΔＺ和ＲＡ／ＲＢ四个原子参数及计算机模式识别方法，求得非配比和配比的近似判据，并探讨其物理意义。

Many intermetallic compounds have a composition range of nonstoichiometry. This phenomenon has been studied by an extended Miedema model, using atomic parameters(Δ Φ * , electronegativity difference; Δ n 1/3 ws , valence electron density difference; Δ Z and R A/ R B) to find regularities by the computered pattern recognition method. The approximate criterion of nonstoichiometry and stoichiometry had been gotten, moreover the physics meaning was discussed.