摘要
以抛光和喷砂的AZ31镁合金为基体,并在基体温度分别为25℃、150℃、250℃下,用等离子喷枪在基体表面喷涂NiAl粉末,研究熔滴粒子扁平行为及涂层的结合机理。研究结果表明:随着基体预热温度的升高,粒子中心扁平凝固区域逐渐扩大;NiAl粉末喷涂时很容易熔化镁合金基体表面,并使基体表面产生凹坑变形,主要是微区冶金结合,提高结合强度。
NiAl particles were plaswa sprayed on polished and blasted AZ31 magnesium alloy substrate at different pre-heating temperatures（25 ℃,150 ℃,250 ℃）.The flattening behaviour of the sprayed particles and the bonding mechanism of the coating to substrate were investigated.The results indicate that the central solidification area of droplets increases with the increase of substrate temperature.NiAl-particles plasma sprayed locally melt the substrate and pitting deformation occurs on its surface.The metallurgical bonding is dominant,leading to high adhesion strength of the coating to substrate.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2010年第6期150-154,共5页
Transactions of Materials and Heat Treatment
