Effects of Sand Blasting on the TBCs Fabrication Quality
CoCrAlY bond coat(BC) and top ceramic coating(TCC) were fabricated on the GH99 super alloy by air plasma spray(APS),before TCC fabrication,BC was treated by sand blasting with different blasting parameters (blasting pressure,blasting speed).The roughness Ra of BC surface was obtained by orthogonal experiment design.Then,cross section morphology of TCC/BC interface were investigated by scanning electron micrograph(SEM),meanwhile TCC/BC interface stresses were analyzed based upon ABAQUS software using finite element method (FEM).The results show that,the roughness of bond coat surface increase first with increasing blasting pressure and speed,and then decrease finally becomes stable.Both maximum tensile stress and compressive stress appear in TCC/BC interface area which is bigger in BC layer than that in TCC layer; with the increase of amplitude of interface triangle,the TCC/BC interface stress increase first then decrease until 7μm amplitude,and then there appears a decrease of the interface stress.
Thermal barrier coatings (TBCs) sand blasting blasting pressure residual stress
Hui Zou Hua Zhang
Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance,Civil Aviation University of China, Tianjin 300300, China
国际会议
广州
英文
290-294
2012-11-16（万方平台首次上网日期，不代表论文的发表时间）