Effect of heat treatment on the microstructure and microhardness of cold-sprayed tin bronze coating

被引：31
作者：
Li, Wen-Ya
Li, Chang-Jiu
Liao, Hanlin
Coddet, Christian
机构：
[1] Univ Technol Belfort Montbeliard, F-90010 Belfort, France
[2] Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2007年 / 253卷 / 14期
基金：
中国国家自然科学基金;
关键词：
cold spraying; heat treatment; tin bronze; coatings; microhardness;
D O I：
10.1016/j.apsusc.2006.12.108
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：
Tin bronze (TB) powder was deposited on a stainless steel substrate by cold spraying. Post-deposition heat treatment was conducted in an electrical resistance furnace under nitrogen atmosphere at a temperature of 850 degrees C for 3 h. The effect of beat treatment on the microstructure and microhardness of cold-sprayed TB coating was investigated. It was found that the as-sprayed TB coating presented a dense microstructure. Heat treatment significantly influenced the microstructure and microhardness of cold-sprayed TB coating. A distinguishable diffusion layer of about 150 mu m was formed in the coating near the coating/substrate interface. A compound was precipitated in the diffusion layer. The microhardness in the coating was changed gradually along the coating from the interface to the coating surface after heat treatment. The microhardness in the diffusion layer was high owing to the precipitation of hard phase, while it was much low in other area due to the obvious grain growth during anneating. (c) 2007 Elsevier B.V. All rights reserved.
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收藏
页码：5967 / 5971
页数：5
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