Wear and corrosion resistance of laser clad Ni2Si/NiSi composite coatings

被引：62

作者：

Wang, HM ^{[1
]}

Wang, CM ^{[1
]}

Cai, LX ^{[1
]}

机构：

[1] Beijing Univ Aeronaut & Astronaut, Sch Mat Sci & Engn, Lab Laser Mat Proc & Surface Engn, Beijing 100083, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2003年 / 168卷 / 2-3期

基金：

中国国家自然科学基金;

关键词：

metal silicides; laser-cladding; coatings; corrosion; wear;

D O I：

10.1016/S0257-8972(03)00240-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Wear- and corrosion-resistant Ni2Si/NiSi composite coatings were fabricated on a substrate of 0.2% C carbon steel by laser-cladding using Ni-40 at.% Si elemental powder blends. Microstructure of the Ni2Si/NiSi composite coatings consists of plate-like Ni2Si primary phase and small amount of Ni2Si/NiSi eutectics in the inter-plate regions. Corrosion properties were evaluated using the anodic polarization and immersion corrosion methods in H2SO4 and NaCl water solutions. Wear resistance was tested under room-temperature block-on-wheel dry sliding wear test conditions. Because of the high hardness and abnormal temperature dependence and excellent corrosion-resisting properties inherent to the nickel silicides Ni2Si and NiSi, the laser clad/rapidly solidified Ni2Si/NiSi composite coatings have excellent chemical and electrochemical corrosion resistance and exhibit outstanding wear resistance and low friction coefficient under dry sliding wear test conditions. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：202 / 208

页数：7

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