研究了一种新型梯度结构的ＥＢ－ＰＶＤ（电子束物理气相沉积）热障涂层的热循环性能，并分析了涂层的失效机制结果表明，由于ＮＩＣｏＣｒＡｌＹ粘结层以及在粘结层上形成的 ＮｉｓＡｌ薄层发生了选择性氧化，从而在粘结层和梯度过渡层之间形成了一层Ａｌ２Ｏ３层、随着热循环时间增长， Ａｌ２Ｏ３层不断增厚，而且在热循环应力作用下，涂层最终沿Ａｌ２Ｏ３层内部断裂失效． The thermal cycling performance of a novel graded EB-PVD (electron-beam physical vapor deposition) thermal barrier coating was investigated and the failure mechanism of the coating was analyzed. The results show that due to the formation of the NICoCrAlY bonding layer and the formation of Of the selective oxidation of the NisAl thin layer has occurred, resulting in a layer of Al2O3 between the adhesive layer and the gradient transition layer, with increasing thermal cycling time, the Al2O3 layer continuously thickening, and under thermal cycling stress, The layer eventually fails along the interior of the Al2O3 layer.