本文研究了激光处理和去应力退火对等离子喷涂热障涂层抗热损伤性能的影响。利用彩色金相、扫描电镜、X射线衍射、拉伸试验,对处理前后的组织结构、抗拉强度进行了检测。结果表明:涂层经激光处理后,基体与Ni/Al界面呈铸态组织,其结合强度明显提高;去应力退火使涂层抗热损伤性能提高,尤以24wt％MgO—ZrO_2涂层效果最佳。 In this paper, the effects of laser treatment and stress relief annealing on the thermal damage resistance of plasma sprayed thermal barrier coatings were studied. The structure and tensile strength before and after treatment were measured by color metallography, scanning electron microscopy, X-ray diffraction and tensile test. The results show that the bonding strength between the matrix and the Ni / Al interface increases obviously after the laser treatment, and the thermal damage resistance of the coating increases with the stress relief annealing, especially the coating with 24wt% MgO-ZrO_2 good.