采用SEM，EPMA和热震方法，研究了CeO2添加剂对等离子喷涂ZrO2涂层抗热震性的影响。结果表明：当CeO2由0增加到9.0%(质量分数,下同)时，涂层的抗热震起裂次数和失效次数分别由32次和46次增加到76次和105次；继续增加CeO2，涂层的抗热震性能急剧下降。ZrO2+9.0%CeO2涂层在热循环中形成的网状微裂纹，不仅可降低涂层中的应力，也可提高涂层开裂的临界温差，从而可改善其抗热震性能。
Effect of additive CeO2 on thermal shock resistance ofplasma-sprayed ZrO2 coating has been investigated using SEM, EPMA and thermal shock tests. As mass fraction of additive CeO2 increases 0 to 9.0%, the lifetimes of fracture initiation and fracture failure increase 32 and 46 cycles to 76 and 105 cycles respectively. Net-shaped microcracks well-distributed in ZrO2+9.0% CeO2 coating resulted in decreasing stress and critical temperature of fracture initiation in coating, so the thermal shock resistance increases.
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