综述了激光熔覆稀土陶瓷涂层研究现状及其最新进展.介绍了激光熔覆工艺特点和影响因素,激光熔覆工艺包括粉末材料的加入方法和激光辐照加工.加入方法分预置法和同步送粉法,工艺参数包括光斑尺寸、扫描速度、熔覆道次、送粉量、涂层厚度和搭接量等.研究认为正确选择工艺参数是保证熔覆层质量和性能的关键.总结了稀土添加剂的强化作用机制,其主要作用为微合金化、净化晶界、细化晶粒、改善晶界状态、抑制柱状晶生长.对激光熔覆稀土陶瓷涂层研究的发展进行了展望.
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