NiCoCrAlY/Ni-ZrO_2复合热障涂层抗高温氧化性能研究  

Study on High Temperature Oxidation Resistance of NiCoAlY/Ni-ZrO_2 Composite Thermal Barrier Coating

作　　者：张作鹏[1] 

机构地区：[1]中国民航大学天津市民用航空器适航与维修重点实验室,天津300300

出　　处：《热加工工艺》2017年第6期168-171,共4页Hot Working Technology

基　　金：国家自然科学基金青年基金资助项目(51501222);中央高校基本科研业务经费中国民航大学专项基金资助项目(3122015L001);中国民航局科技计划基金资助项目(MHRD2016006)

摘　　要：采用电泳共沉积、真空烧结致密化处理和高速电喷镀工艺,在K17镍基超强耐热合金表面制备NiCoCrAlY/Ni-ZrO_2热障涂层,并进行1000℃抗高温氧化试验。采用SEM、EDS、XRD分析NiCoCrAlY/Ni-ZrO_2热障涂层在高温氧化过程中合金元素的扩散规律。结果表明,NiCoCrAlY/Ni-ZrO_2热障涂层氧化失重为10.1778 mg/cm^2,远低于K17镍基高温合金。在高温氧化过程中生成α-Al_2O_3和Cr_2O_3能提高NiCoCrAlY/Ni-ZrO_2热障涂层的高温抗氧化性。NiCoCrAlY/Ni-ZrO2 thermal barrier coatings on nickel-based alloys K17 surface were prepared by electrophoretic deposition, vacuum sintered densification process and high-speed electric plating process, meanwhile, 1000 ℃ high-temperature oxidation test was conducted. The diffusion law of alloying elements in NiCoCrAlY/Ni-ZrO2 thermal barrier coating in high-temperature oxidation process were analyzed by SEM, EDS and XRD. The results show that the oxidation mass loss of NiCoCrAlY/Ni-ZrO2 thermal barrier coating is 10.1778 mg/cm^2 , which is much lower than that of nickel-base alloys K17. α-Al2O3 and Cr2O3 oxide film appear during high temperature oxidation process, which can improve high temperature oxidation resistance of NiCoCrAlY / Ni-ZrO2 thermal barrier coating.

关 键 词：NiCoCrAlY/Ni-ZrO2 电泳沉积 真空烧结 高速电喷镀 

分 类 号：TG174[金属学及工艺—金属表面处理]