磨料水射流去除等离子喷涂法热障涂层的试验研究  

Experimental Research on Abrasive Water Jet Drilling of APS Ceramic Thermal Barrier Coating

作　　者：谢天海 高长水[1] 郭超 刘壮[1] XIE Tianhai;GAO Changshui;GUO Chao;LIU Zhuang(College of Mechanical and Electric Engineering,Nanjing University of Aeronautics&Astronautics,Nanjing,210016,China;Wuxi Research Institute,Nanjing University of Aeronautics&Astronautics,Wuxi,214000,China)

机构地区：[1]南京航空航天大学机电学院,南京210016 [2]南京航空航天大学无锡研究院,无锡214000

出　　处：《南京航空航天大学学报》2020年第5期792-799,共8页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家重点研发计划(2018YFB1105900)资助项目;国家自然科学基金(51675273)资助项目。

摘　　要：热障涂层技术在航空发动机中具有延长热端部件使用寿命、提高功率和减少燃油消耗的优点。对热障涂层金属构件进行电火花小孔加工时,需要先去除金属基体表面的热障涂层。针对等离子喷涂法(Air plasma spray,APS)制备的热障涂层进行了磨料水射流去除加工试验。采用直径为300μm的低压磨料水射流,在室温下开展APS涂层的盲孔加工试验,以期为后续的电火花穿孔加工提供可能性。结果表明,冲蚀孔径和孔深随磨料浓度、射流压力、冲孔时间和靶距的增加而增大,涂层去除速率随磨粒硬度和粒径的增加而提高,APS涂层的冲蚀效率明显高于EB‑PVD涂层。Thermal barrier coating(TBC)technology has the advantage of extending hot end component life,increasing power and reducing fuel consumption in aerospace engines.However,before performing electro‑discharge machining(EDM)on the thermal barrier coated metal member,it is necessary to remove the thermal barrier coating on the surface of the metal substrate.Abrasive water jet machining(AWJM)are performed on the thermal barrier coating prepared by APS.Blind hole processing test of APS coating is carried out at room temperature using a low pressure abrasive water jet having a diameter of 300μm.The results show that the erosion pore size and pore depth increase with the increase of abrasive concentration,jet pressure,punching time and target distance,and the coating removal rate increases with the increase of abrasive grain hardness and particle size.The roundness of the erosion hole type has yet to be improved.

关 键 词：磨料水射流加工 等离子喷涂法 热障涂层 微小孔加工 冲蚀孔型特征 

分 类 号：V26[航空宇航科学与技术—航空宇航制造工程]