In-situ plasma spraying: Alumina formation and in-flight particle diagnostic
In-situ plasma spraying: Alumina formation and in-flight particle diagnostic
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DOI：
10.1016/j.surfcoat.2008.03.013
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发表时间：
2008-05
影响因子：
5.4
通讯作者：
C. Tekmen;Masashi Yamazaki;Y. Tsunekawa;M. Okumiya
中科院分区：
文献类型：
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作者：
C. Tekmen;Masashi Yamazaki;Y. Tsunekawa;M. Okumiya
原位等离子喷涂（IPS）是一种制备具有原位生成的热稳定相的复合涂层的方法。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，获得了原位生成的Al 2 O3增强过共晶Al-18 Si基合金复合涂层。研究了喷涂参数（电弧电流和喷涂距离）和飞行粒子特性（温度和速度）对原位反应强度（氧化铝和硅）的影响。结果表明，原位氧化铝的形成和硅的强度强烈依赖于飞行粒子的特性，喷涂距离和基板温度。
In-situ plasma spraying (IPS) is a promising process to fabricate composite coatings with in-situ formed thermodynamically stable phases. In the present study, mechanically alloyed Al–12Si and SiO2powder was deposited onto an aluminum substrate by atmospheric plasma spraying (APS) to obtain a composite coating consisting of in-situ formed alumina reinforced hypereutectic Al–18Si matrix alloy. The effects of spray parameters (arc current and spray distance) and in-flight particle characteristics (temperature and velocity) on in-situ reaction intensity (alumina and silicon) have been investigated. The results show that, in-situ alumina formation and silicon intensity strongly depend on in-flight particle characteristics, spray distance and substrate temperature.