Formation of metastable solid solutions by mechanical alloying of immiscible Ag and Bi

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• 作者：Elodia Musu ; Giovanna Mura ; Giorgio Ligios ; Francesco Delogu
• 关键词：Mechanical alloying ; Transition metals ; Phase transformation kinetics
• 刊名：Journal of Alloys and Compounds
• 出版年：2013
• 出版时间：5 November, 2013
• 年：2013
• 卷：576
• 期：Complete
• 页码：80-85
• 全文大小：1705 K

文摘

This work investigates the effects of the Vickers micro-hardness of Ag powders on the alloying process undergone by Ag₉₀Bi₁₀ powder mixtures submitted to ball milling. The transformation kinetics has been studied by quantitative X-ray diffraction. The experimental findings indicate that Bi gradually dissolves into Ag, finally forming a crystalline solid solution in which thermodynamic solubility limits are largely exceeded. It is shown that the rate of Bi dissolution, and the solubility degree, decrease as the Vickers micro-hardness of Ag powders increases.