研究了用高速火焰喷涂(HVOF)替代低压等离子喷涂(LPPS)沉积高质量的MCrAlY涂层.试验用粉料为NiCoCrAlTaReSiY,采用以煤油为燃料的K2型HVOF系统沉积涂层,研究喷嘴长度、喷涂工艺参数对粉末沉积工艺过程以及涂层性能的影响;测量涂层的孔隙率及氧含量,观察涂层经真空热处理以及高温空气氧化后的显微结构,测量了Al、O等元素在氧化涂层中的分布.结果表明,所沉积的NiCoCrAlTaReSiY涂层具有优越的抗氧化性.
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