用点阵参数法研究了在熔体淬火条件下若干简单金属与类金属在Ag中固溶度的亚稳扩展。发现与Ag发生一系列包晶反应的二元合金的固溶度扩展符合电子浓度规律,并结合相图特征讨论了包晶系固溶度扩展的规律。简单共晶合金的固溶度扩展并不满足电子浓度规律,用Miedema理论解释了Si在Ag中固溶度低的原因。
The metastable extension of solid solubility of certain simple metals or metalloids in Ag has been studied by means of the lattice parameters measurement when the aUoy specimens quenched from melts. It is found that the solid solubility metastable extension of such elements in Ag that form a lot of peritectic binary alloys with Ag is conformed to the rule of valence electron concentration, but that of those which form eutectic or monotectic alloys does not satisfy the rule. The peritectic alloys may be classified into two types with quite different behaviours of solid solubility metastable extension. It seems to be easily clarified that the influence of the composition range of intermediate phase on the solid solubility metastable extension is more important than its stability. The reason why Si is less soluble in Ag has been also discussed by Miedema's theory.
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