| 摘要: |
| Darken-Garry图以原子半径-电负性为判据预测合金固溶度, 但电负性导致预测正确率低，为此本文提出创建A(原子半径)-I(电离能)图的方案.选择有代表性的, 如Mg、Al、Cu、Ti等20个元素作溶剂组元，若干已知固溶度的元素作溶质，组成796个合金系对D-G图和A-I图的预测效果进行比较.研究表明, 平均正确率:对可溶元素D-G图约为51%，A-I图约为73%；对不溶元素D-G图约为89%，A-I图约为84%.A-I图比D-G图在提高预测正确率方面拥有优势，对于副族元素尤为显著，电离能比电负性更胜任预测合金固溶度判据的角色. |
| 关键词: 金属学与热处理 合金固溶度 Hume-Rothery法则 Darken-Garry图 原子半径 电负性 电离能 |
| DOI：10.11951/j.issn.1005-0299.20180071 |
| 分类号:TG111.5 |
| 文献标识码:A |
| 基金项目: |
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| A-I diagram for predicating solid solubility of alloys |
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ZHOU Tiecheng
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(School of Materials Science and Engineering, North University of China, Taiyuan 030051,China)
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| Abstract: |
| Darken-Garry diagram predicts solid solubility of alloys based on atomic radius-electronegativity. In view of the low accuracy caused by electronegativity, a scheme of A (atomic radius)-I (ionization energy) diagram is proposed. 796 alloy systems composed of 20 representative elements such as Mg, Al, Cu, Ti, etc. to serve as solvent components and several solutes with known solid solubility were used to make a comparison between the prediction effectiveness of D-G diagram and A-I diagram. The results showed that the average prediction accuracy of D-G diagram and A-I diagram for soluble elements was about 51% and 73% respectively; for insoluble elements, the accuracy was about 89% by D-G diagram and about 84% by A-I diagram. A-I diagram has obvious advantages over D-G diagram in improving prediction accuracy, especially for the sub-group elements. Ionization is more capable than electronegativity in serving as the prediction criterion of solid solubility of alloys. |
| Key words: metallography and heat treatment solid solubility of alloy Hume-Rothery law Darken-Garry diagram atomic radius electronegativity ionization energy |
