以常规和纳米团聚体ZrO2-7%Y2O3(质量分数)陶瓷粉为原料,采用等离子喷涂工艺在TiAl合金表面制备热障涂层;用扫描电镜和显微硬度计分析了涂层形貌、显微结构及显微硬度,并对涂层的摩擦学特性及抗高温氧化性能进行了研究.结果表明:常规陶瓷涂层呈典型的层状堆积特征;纳米结构涂层呈纳米颗粒完全熔化后重结晶得到的基体相和未完全熔化的纳米颗粒嵌入组成的两相结构;纳米结构涂层的表面硬度较高为1267.6HV,摩擦因数较低为0.8,850℃氧化100h的质量增加仅为2.64mg·cm(-2).
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