Calculation of high-speed abrasion forces for ceramic coatings based on the Hertzian contact model  

作　　者：裴祥忠 丁坤英 Pei Xiangzhong;Ding Kunying(Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance,Civil Aviation University of China,Tianjin 300300,China

出　　处：《China Welding》2024年第1期52-59,共8页中国焊接（英文版）

基　　金：supported by Basic Research Funds for Central Universities(3122019189).

摘　　要：Aero engine seal coatings can effectively improve the air tightness of aircraft engines and increase fuel efficiency.However,due to the frictional forces between the blades and the coating,the coating often flakes off,resulting in damage to the blades and causing eco-nomic losses.Therefore,it is necessary to analyze the friction between the blades and the coating.In this paper,three ceramic-based high-temperature seal coatings with different polyphenylene ester contents and a pure Yttria-stabilised zirconia coating were prepared by atmo-spheric plasma spraying(APS).The hardness and modulus of elasticity of the coated surfaces were obtained by hardness and modulus of elasticity tests,and the coatings were subjected to high-speed touch abrasion tests.The Hertzian contact model was used to calculate the maximum normal contact load on the coating during the process.The test values were compared with the theoretical values and it was found that the calculated values were always greater than the test values.In order to make the Hertzian contact model more accurate in calculating the touching and abrasion forces,the contact coefficients in the Hertzian contact model were optimized.Substituting the optimized coeffi-cients into the Hertzian contact model,the results show that the calculated results after optimizing the coefficients are much closer to the test values,with deviations from the test values ranging from 1%to 38%.

关 键 词：sealing coating atmospheric plasma spraying high-speed collision and wear Hertzian contact model optimization coefficient 

分 类 号：TG174.4[金属学及工艺—金属表面处理] V263[金属学及工艺—金属学]