1.IntroductionrnThe artificial-designed segmentation cracks in the ceramic layer of the thermal barrier coatings is an excellent choice by using the atmospheric plasma spray (APS) method under a low cost on the applications of aircraft engines or gas turbine engines.The residual thermal stress energy of the coatings with a certain inter-space of vertical cracks during the thermal cycling test is released through the cracks.The coating with vertical cracks was found out to be superior to other coatings with conventional lamellar structure[1].This process by using the atmospheric plasma spray method usually deposited a dense layer of YSZ (usual thickness of 0.5-1.5 mm) and heating the substrate over 773 K with an auxiliary device previously,even for a complex curved surface of the vanes.