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| 钯与周期表元素相互作用及固溶度分析 |
| Alloying Characteristics and Solid Solubilities of Periodic Table Elements in Palladium |
| Received:October 28, 2013 |
| DOI： |
| 中文关键词: 金属材料 合金化原理 固溶度 米德玛键参数 溶解度方程 |
| 英文关键词: metal material alloying principle solid solubility Miedema’s bond parameters solubility equation |
| 基金项目: |
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| 中文摘要: |
| 总结了周期表元素与Pd的相互作用，按富Pd合金的相图特征，采用经典合金化理论和米德玛键参数分析了固溶度的规律性。建立了周期表元素在Pd中的溶解度方程:lnCmax =4.6052 –k(|Δnws1/3|– nR)，溶质在Pd溶剂中的极限固溶度 (lnCmax)是Pd溶剂与溶质之间的电子密度差|Δnws1/3|的减函数。当Pd溶剂与溶质之间的电子密度差|Δnws1/3|相同时，简单金属溶质在Pd中的固溶度大于过渡金属溶质，简单金属和过渡金属溶质在Pd溶剂中具有不同的固溶机制。分析了以各贵金属元素作为溶剂对周期表元素的溶解能力指数与溶质元素电子密度nws1/3的关系，Pd作为溶剂对周期表元素具有最大溶解能力。 |
| 英文摘要: |
| Some regularities of interactions of palladium with periodic table elements were summarized, and the solid solubilities of periodic table elements in palladium were analyzed by the classical solid solubility theory and Miedema’s bond parameters. A solubility equation, lnCmax =4.6052–k (|Δnws1/3|– nR), was established, the limit solid solubility (lnCmax), of solutes in palladium increases with the electron density difference, |Δnws1/3|, between them. The solid solubilities of the simple metal solutes in palladium are larger than those of transition metal solutes with same Δnws1/3 based on different solubility mechanisms. The relationship of solvability ability indexes of precious metals as solvents with their electron density nws1/3 were analyzed by their electron density parameters nws1/3, and the palladium solvent has the largest solubility ability index for periodic table elements as solutes. |
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