粘结层喷涂方法对铜基体与热障涂层结合强度的影响  

Effect of Metallic Bonded Coatings Prepared via Different Spraying Methods on the Adhesion of Ceramic Thermal Barrier Coating to Copper Substrate

作　　者：李晨希[1] 尹红霞[1] 徐娜[1] 孙克君[1] 徐婷婷[1] 

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110178

出　　处：《材料保护》2009年第4期59-60,69,共3页Materials Protection

基　　金：辽宁省教育厅科学研究计划(05L294);辽宁省教育厅创新团队基金项目(2007)资助

摘　　要：为提高铜基体上热障涂层的工作温度和寿命,分别采用超音速火焰喷涂(HVOF)和等离子喷涂(APS)制备NiCrAlY粘结层,采用等离子喷涂制备ZrO2-8%Y2O3陶瓷面层。用拉伸试验测试了热障涂层的结合强度,利用SEM分析了拉伸断口的成分分布和微观形貌。研究表明,用HVOF制备粘结层的热障涂层的结合强度为47.9 MPa,用APS制备粘结层的热障涂层的结合强度为31.2 MPa。与等离子喷涂制备粘结层相比,采用超音速火焰喷涂制备粘结层可明显提高ZrO2陶瓷涂层的结合强度。Bonded coatings of NiCrAlY were prepared on copper substrate via high velocity oxy - fuel spraying ( HVOF) and atmospheric plasma spraying (APS) , respectively, aiming at increasing the adhesion of plasma sprayed ZrO2-8% Y2O3 thermal barrier coating to the Cu substrate. The effect of the metallic bonded coatings prepared with two different methods on the adhesion of the ceramic thermal barrier coating to Cu substrate was investigated based on tensile test. The elemental distribution and microstructure of the tensile fracture were analyzed by means of scanning electron microscopy. It was found that the ceramic thermal barrier coating sitting on the metallic bonded coating pre-pared by HVOF had an adhesion to substrate of 47.9 MPa, while the thermal barrier coating associated with the metallic bonded coating fabricated by APS had an adhesion to substrate of 31. 2 MPa. This indicates that it would be feasible to greatly increase the adhesion of ceramic thermal barrier coating to Cu substrate by introducing metallic bonded coating via HVOF route.

关 键 词：超音速火焰喷涂 等离子喷涂 热障涂层 铜基体 粘结层 结合强度 

分 类 号：TG174.442[金属学及工艺—金属表面处理]