Medium-range order and physical properties of Cu-20at.% Sb melts

被引：11

作者：

Guo, Fengxiang ^{[1
]}

Zheng, Hongliang ^{[1
]}

Qin, Jingyu ^{[1
]}

Qin, Xubo ^{[1
]}

Lv, Ting ^{[1
]}

Jia, Yan ^{[1
]}

Xu, Rongfu ^{[1
]}

Tian, Xuelei ^{[1
]}

机构：

[1] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Sch Mat Sci & Engn, Jingshi Rd 17923, Jinan 250061, Peoples R China

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2012年 / 358卷 / 23期

基金：

中国国家自然科学基金;

关键词：

Liquid structure; X-ray diffraction; Cu-Sb alloys; Electrical resistivity; Ab initio molecular dynamics simulation; AUGMENTED-WAVE METHOD; LIQUID-METALS; THERMODYNAMIC PROPERTIES; ALLOYS; CRYSTAL; BISMUTH; GLASSES; SYSTEMS; GROWTH; FILMS;

D O I：

10.1016/j.jnoncrysol.2012.09.007

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Local structure of Cu-20at.%Sb melts has been studied by X-ray diffraction and ab initio molecular dynamics simulation. Pre-peaks in relation with medium-range order are observed in structure factor. Negative Warren-Cowley parameters reflect the existence of chemical order. With an obvious pre-peak. broadening intensities of Cu3Sb are in good agreement with experimental results, indicating structure similarity of Cu3Sb to ordered clusters in the melts. These imply that origin of pre-peaks is in relation with Cu3Sb-like clusters. Abnormally large activation energy of viscous flow and negative temperature coefficient of resistivity are well interpreted as the existence of medium-range order clusters. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：3327 / 3331

页数：5

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