Study on impact fusion at particle interfaces and its effect on coating microstructure in cold spraying

被引：114
作者：
Li, Wen-Ya
Zhang, Chao
Guo, Xueping
Li, Chang-Jiu
Liao, Hanlin
Coddet, C.
机构：
[1] Univ Technol Belfort Montbeliard, LERMPS, F-90010 Belfort, France
[2] 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 / 254卷 / 02期
关键词：
cold spraying; particles; aluminium alloy; titanium alloy; nickel alloy; impact fusion;
D O I：
10.1016/j.apsusc.2007.06.026
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：
This paper deals with the impact melting phenomenon at the interfaces between the deposited particles in cold-sprayed coatings and its effect on coating microstructure and particle bonding mechanism. Al-12Si, Al2319, Ti, Ti-6Al-4V, Ni and NiCoCrAlTaY powders were selected as feedstocks, which have various thermal and mechanical properties. The analytical results showed that most of the used materials possibly experienced the local melting at the contact interfaces of particles under certain impact conditions. Low melting point, relatively high gas temperature and chemical reaction with the atmosphere are the main factors contributing to the impact fusion during cold spraying. The results also indicated that the local melting would benefit the formation of a metallurgical bonding between the deposited particles and enhance the coating cohesion. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：517 / 526
页数：10
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