在TiAl合金中加入以Ce和La为主要元素的混合稀土得到普通铸态和熔体旋淬法试样. 稀土元素以金属间化合物AlCe(AlLa)分别存在于晶粒边界和层片结构之上. 本文基于对二元合金平衡相图的分析以及应用Miedema生成热模型对稀土相AlCe(AlLa)的形成进行了分析. 结果表明, Al元素与Ce和La的亲和力远大于其与Ti之间的亲和力, 因此, TiAl基合金中的富稀土相以AlCe(或AlLa)的形式存在, 是必然的结果.
参考文献
| [1] | Young Won Kim.Ordered intermetallic alloys Part III: gamma titinium aluminides[J].Journal of The Minerals,Metals & Materials Society,1994(07):30. |
| [2] | Young Won Kim.Intermetallic alloys based on gamma titinium aluminide[J].Journal of The Minerals,Metals & Materials Society,1989(07):24. |
| [3] | 沈军,马学著,贾均.快速凝固TiAl基合金稀土相显微组织的研究[J].中国稀土学报,2001(02):129-132. |
| [4] | 马学著 .快速凝固TiAl基合金的显微组织及其热稳定性研究[D].哈尔滨工业大学,2001. |
| [5] | SU Yanqing;Guo Jingjie;Ding Hongsheng.Components evaporation of Ti-15-3 melt during ISM processing[J].Journal of Materials Science and Technology,2001(17):99. |
| [6] | 郭景杰;刘源;苏彦庆 等.TiAl合金ISM熔炼过程中Al元素挥发动力学研究[J].金属学报,1999,35(s1):224. |
| [7] | Guo Jingjie;Su Yanqing;Jia Jun;Ding Hongsheng;Liu Yuang;Ren Zhijiang .Mechanism of skull formation during induction skull melting of intermetallic compounds[J].International Journal Cast Metals Research,1999(1):35-40. |
| [8] | 马学著,沈军,贾均.Study on Rare Earth-Containing Phases in TiAl Based Alloys |
| [9] | Massalski T B;Okamoto H;Subramanian P R.Binary alloy Phase Diagram . 2nd edition (Vol. 1-3)[M].ASM;Ohio:Metals Park,1990 |
| [10] | Miedema A R .The electronegativity parameter for transition metals: heat of formation and charge transfer in alloys[J].Journal of the Less-Common Metals,1973,32:117. |
| [11] | Miedema A R;Dorleijin J W F .Predictions of the heat of adsorption of metals on metallic substrates[J].Surface Science,1980,95:447. |
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