The resistance to wear and corrosion of laser-cladding Al2O3 ceramic coating on Mg alloy

被引：85
作者：
Gao Ya-li [1 ]
Wang Cun-shan
Yao Man
Liu Hong-bin
机构：
[1] Dalian Univ Technol, Key State Lab Mat Modificat, Dalian 116023, Peoples R China
[2] Dalian Univ Technol, Dept Mat, Dalian 116023, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2007年 / 253卷 / 12期
关键词：
magnesium alloy; Al2O3 ceramic coating; plasma spraying; laser remelting;
D O I：
10.1016/j.apsusc.2006.12.001
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 paper presents a study on the preparation of Al2O3 ceramic coating on AZ91HP Mg alloy by laser remelting plasma-sprayed coating. It was found that after laser remelting, the coating exhibited obvious layer-like characteristics due to influence of temperature distribution, thermophysical parameters and layer thickness. According to the microstructural difference, the coating can be divided into the melted zone with the alpha-Al2O3 column-like crystal, the sintered zone with flock-like structure, the residual plasma-sprayed zone with loosened structure. Because of the dense column-like crystal, the hardness, wear and corrosion resistance of the laser remelted coating are much higher than those of the plasma-sprayed coating and as-received Mg alloy. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：5306 / 5311
页数：6
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