Reduction mechanism of surface oxide films and characterization of formations on pulse electric-current sintered Al-Mg alloy powders

被引：31

作者：

Xie, GQ

Ohashi, O

Song, MH

Mitsuishi, K

Furuya, K

机构：

[1] Natl Inst Mat Sci, Nanomat Lab, Tsukuba, Ibaraki 3050003, Japan

[2] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502181, Japan

来源：

APPLIED SURFACE SCIENCE | 2005年 / 241卷 / 1-2期

关键词：

reduction reaction; HRTEM; pulse electric-current sintering; Al-Mg alloy; oxide film;

D O I：

10.1016/j.apsusc.2004.09.025

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The microstructure of interfaces between powder particles in Al-Mg alloy specimens sintered by pulse electric-current sintering (PECS) process was characterized using high resolution transmission electron microscopy (HRTEM) and energy dispersive X-ray spectroscopy (EDS). The crystalline precipitates with nano-size in the interface were observed in all of Al-Mg alloy specimens. The composition was determined to be MgAl2O4 or MgO, or both of them, which depended on Mg content in alloy powder and sintering temperature. The precipitates were suggested to contribute to reduction reaction of Mg with oxide films originally covered at powder particles surface. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：102 / 106

页数：5

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