Relativity of medium range order in molten Cu-Sn alloys and phase diagram

被引：7

作者：

Xue, XY ^{[1
]}

Bian, XF ^{[1
]}

Geng, HX ^{[1
]}

Sun, M ^{[1
]}

Qin, XB ^{[1
]}

机构：

[1] Shandong Univ, Minist Educ, Key Lab Liquid Struct & Hered Mat, Jinan 250061, Peoples R China

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2003年 / 19卷 / 05期

关键词：

D O I：

10.1179/026708303225002064

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Evolution of the medium range order (MRO) in Cu - Sn alloy melts with different compositions at the same superheat temperature has been studied. A prepeak, which characterises the MRO, appeared in front of the main peak. Based on the positions Q(pp) and heights H-pp of the prepeak on the structure factors of liquid Cu - Sn alloys, it was found that the Q(pp) was higher around Cu5Sn, and the highest at Cu5Sn while the H-pp was smaller, and a minimum at Cu5Sn. As proved by the first peak of the pair correlation functions and the coordination numbers, the molten structure of Cu - Sn changes from order to disorder largely when the tin concentration is in the range of 35.3 - 60 wt-%. In addition, a shoulder appears on the right side of the first peak of the pair correlation function and shifts to small r (real space).

引用

页码：557 / 560

页数：4

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