Equilibrium crystal shape of Bi-saturated Cu crystals at 1223 K

被引：32

作者：

Chatain, D

Wynblatt, P

Rohrer, GS

机构：

[1] CNRS, Ctr Rech Mat Condensee & Nanosci, F-13288 Marseille, France

[2] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA

来源：

ACTA MATERIALIA | 2005年 / 53卷 / 15期

基金：

美国国家科学基金会;

关键词：

bismuth; copper; surface segregation; equilibrium crystal shape; surface energy;

D O I：

10.1016/j.actamat.2005.05.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The equilibrium crystal shape (ECS) of Bi-saturated Cu at 1223 K has been studied, after quenching the material to room temperature, by a scanning electron microscopy investigation of the shapes of pores (or negative crystals) that are present on grain boundary fracture surfaces. Bi-saturation of Cu surfaces at 1223 K results in dramatic changes in the ECS compared to pure Cu. Whereas all possible surface orientations are stable in the case of pure Cu, only the {111}, {100}, {110}, and {320} orientations are stable in Bi-saturated Cu crystals. In addition, the weak maximum anisotropy of pure Cu of 2% is increased fourfold by Bi saturation of the surface. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：4057 / 4064

页数：8

共 23 条

[1]

CAHN JW, 1993, MAT SCI ENG A-STRUCT, V162, P83, DOI 10.1016/0921-5093(90)90032-X

[2] The solidus line of the Cu-Bi phase diagram [J].