Effect of plasma spray parameters on in-flight particle characteristics and in-situ alumina formation
Effect of plasma spray parameters on in-flight particle characteristics and in-situ alumina formation
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DOI：
10.1016/j.surfcoat.2008.08.057
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发表时间：
2008-11
影响因子：
5.4
通讯作者：
C. Tekmen;Y. Tsunekawa;M. Okumiya
中科院分区：
文献类型：
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作者：
C. Tekmen;Y. Tsunekawa;M. Okumiya
采用大气等离子喷涂（APS）技术在铝基体上制备了Al-12 Si和SiO2机械合金化粉末，获得了过共晶Al-Si基原位生成氧化铝复合涂层。研究了工艺参数（电弧电流、喷涂距离、喷嘴类型、氧气支持和基底冷却）对飞行中粒子特性（温度和速度）和原位氧化铝形成的影响。已经观察到，虽然电弧电流和喷嘴内径强烈影响飞行中的颗粒特性和原位氧化铝形成，氧气支持的效果是微不足道的。此外，结果表明，基板冷却相当大地阻碍氧化铝的形成。
In the present study, mechanically alloyed Al–12Si and SiO2powder was deposited onto an aluminum substrate by atmospheric plasma spraying (APS) to obtain a hypereutectic Al–Si based in-situ alumina formed composite coating. The effect of process parameters (arc current, spray distance, nozzle type, oxygen gas support and substrate cooling) on in-flight particle characteristics (temperature and velocity) and in-situ alumina formation were investigated. It has been observed that while arc current and nozzle inner-diameter strongly affects the in-flight particle characteristics and in-situ alumina formation, the effect of oxygen gas support is insignificant. Also, the results show that the substrate cooling considerably hinders alumina formation.