Interface microstructure and mechanical properties of zinc-aluminum thermal diffusion coating on AZ31 magnesium alloy

被引：24

作者：

Sun, An ^{[1
]}

Sui, Xiaoming ^{[1
]}

Li, Haitao ^{[1
,2
]}

Wang, Qiang ^{[1
]}

机构：

[1] Jilin Univ, Coll Mat Sci & Engn, Changchun 130022, Peoples R China

[2] Jiamusi Univ, Sch Mat Sci & Engn, Jiamusi 154007, Peoples R China

来源：

MATERIALS & DESIGN | 2015年 / 67卷

关键词：

Magnesium alloy; Thermal diffusion; Microstructure; Eutectic structure; Eutectoid structure; CORROSION BEHAVIOR; AL; SURFACE;

D O I：

10.1016/j.matdes.2014.11.047

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The zinc-aluminum (Zn-Al) alloy coating with excellent wear and corrosion resistance was fabricated on the surface of magnesium substrate (AZ31) using thermal diffusion technique. The microstructure, phase constitution and chemical composition were investigated. The experimental observation exhibited that the interfacial microstructures were composed of network eutectic structures and lamellar eutectoid structures at heating temperature of 350 degrees C for holding time of 30 min under 0.1 MPa in a vacuum of 10(-3) Pa. X-ray diffraction (XRD) pattern analysis identified that alpha-Mg, Mg7Zn3 and MgZn phases were formed in the diffusion layer. The interdiffusion of Mg and Al atoms were restricted by Mg-Zn intermetallic compounds (IMCs). The value of microhardness at the diffusion layer increased due to the formation of Mg-Zn eutectic phases. This technique is beneficial to improving poor wear and corrosion resistance of magnesium alloy. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：280 / 284

页数：5

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