通过大气等离子喷涂(APS)制备了一种基于锆酸镝(Dy2Zr2O7)的新型热障涂层,该涂层具有更低的热导率及与镍基高温合金更匹配的热膨胀系数.对涂层的结构、相组成以及抗热震性能进行了研究.此外,对涂层在热震循环过程中的失效过程进行了讨论.结果表明,在6～8次热震循环后,涂层从基体表面脱落.陶瓷层中的微裂纹在热震过程中生长并导致粘结层界面附近的陶瓷层被压碎,从而最终导致陶瓷层的脱落.
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