探索热障涂层在热震中裂纹的形成规律 ,揭示涂层热震危险截面位置 .采用在铝基体上以等离子喷涂法制备 Al/Ni- Zr O2 功能梯度涂层 ,在所研制的热性能测试仪上 ,用单面加热急冷法 ,观察不同热循环次数下的裂纹形成情况 .结果是热震 15次时首先在纯 Zr O2 与 Zr O2 和 Al/Ni质量比为 8∶ 2的界面上方产生水平裂纹 ,5 0次时出现龟裂纹 .热震裂纹出现的最危险截面在上述界面上方大约 80 μm处 ,此处热应力最大 . Explores the formation regularity of thermal barrier coatings during thermal shock and reveals the dangerous cross-section location of thermal shock.An Al / Ni-Zr O2 functional graded coating was prepared by plasma spraying on aluminum substrate, On the instrument, the formation of cracks under different thermal cycles was observed by the one-surface heating and quenching method, and the result was that when thermal shock was 15 times, the crack was first produced at the interface of pure ZrO2 and ZrO2 and Al / Ni mass ratio of 8: 2 Horizontal cracks and turtle cracks occur 50 times, and the most dangerous cross section of thermal shock cracks is about 80 μm above the above interface, where the thermal stress is the largest.