金属学报  1981, Vol. 17 Issue (2): 225-227

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二元A-15相的形成及其T_c变化的参数规律——电子密度和组元半径比的综合影响

施天生;张宏;郑龙如

中国科学院上海冶金研究所;中国科学院上海冶金研究所;中国科学院上海冶金研究所

AN EMPIRICAL RULE OF BINARY A-15 PHASES FORMATION AND THEIR T_c VARIATION

Shi Tiansheng; Zhang Hong and Zheng Longru (Shanghai Institute of Metallurgy; Academia Sinica)

施天生;张宏;郑龙如. 二元A-15相的形成及其T_c变化的参数规律——电子密度和组元半径比的综合影响[J]. 金属学报, 1981, 17(2): 225-227.
, , . AN EMPIRICAL RULE OF BINARY A-15 PHASES FORMATION AND THEIR T_c VARIATION[J]. Acta Metall Sin, 1981, 17(2): 225-227.

摘要 参考文献 相关文章 Metrics 全文: PDF(225 KB)   摘要: <正> A-15相是一类特殊的A_3B型化合物,其中A元素必须是ⅣA,ⅤA,ⅥA族过渡元素。电子密度e/a和组元A,B的半径比r_A/r_B是决定A-15相性质的两个重要因素。Matthias首先注意到e/a对A-15相超导临界温度T_c的影响。当e/a=4.7和6.5时,T_c分布的包络线上出现两个峰。但也有不少A-15相虽然具有最适宜的e/a值,T_c仍很低,甚至根本没有超导性。Hartsough总结了影响A-15相形成的因素,认为r_A/r_B= Abstract：The binary A-15 phases formation and their T_c variation have been studied by means of the bond-parametric diagram. It was ascertained that the A-15 phases locate in a definite region on the plot of electron density e/a vs radii ratio of components r_A/r_B. The A-15 phase cannot form any longer for the ratio r_A/r_B over a certain critical value which varies with e/a periodically. On the plot, the T_c distribution of A-15 Phases is shown with regularity. The A-15 phases with T_c higher than 1, 4.2, 10, 15 or 20 K are concentrated in the regions of corresponding isotherms. The ratio r_A/r_B, and e/a as well, may be important parameters in determining T_c. As compared with Matthias' rule, a better result in determining the location of A-15 phases of high T_c has been obtained by the consideration of both factors. 收稿日期: 1981-02-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 施天生 张宏 郑龙如 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1981/V17/I2/225 [1] Matthias, B. T., Phys. Today, 24 (1971) , № 8, 23． [2] Hartsough, L. D., J. Phys. Chem. Solid, 45 (1974) , 1691． [3] 陈念贻,中国科学,1974,№ 6,580． [4] Testardi, L. R., Rev. Mod. Phys., 47 (1975) , 637． [5] Roberts, B. W., J. Phys. Chem. Ref. Data., 5 (1976) , 581． [6] #1 No related articles found! Viewed Full text Abstract Cited   Shared      Discussed