纳米陶瓷粉末(CYZ:ZrO2-4.5wt%Y2O3-25wt%CeO2和YSZ:ZrO2-8wt%Y2O3)经过团聚后,采用等离子喷涂(APS)方法在GH30高温合金表面制备热障涂层(TBC).用透射电镜(TEM)、扫描电镜(SEM)、场发射显微镜(FESEM)和X射线衍射仪(XRD)对团聚体粉末在等离子焰流中的熔化情况、制备的涂层组织结构进行了分析研究.结果表明:团聚后的球形粉末经过等离子弧后对于较大的团聚体颗粒只是表层约1μm被熔化,颗粒内部仍保持原始粉末的纳米结构;制备的涂层主要由熔化结晶部分和未熔化的纳米粒子构成,熔化结晶部分晶粒尺寸为60～80nm,大于原始粉末尺寸;CYZ涂层组成相为稳定的t相和c相,涂层中分布有大量的微裂纹和闭合的孔隙;两种涂层的孔隙率分别为6.2%和7.6%.
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