热障涂层的制备及热震性能  

Preparation and Thermal Shock Performance of ZrO_2/NiCrAlY Thermal Barrier Coating

作　　者：王令双 曹国剑[1] 唐光泽[2] 许万娇 马欣新[3] 

机构地区：[1]哈尔滨理工大学材料科学与工程学院,哈尔滨150080 [2]哈尔滨工业大学金属精密热加工国防科技重点实验室,哈尔滨150001 [3]哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨150001

出　　处：《航空材料学报》2017年第2期44-48,共5页Journal of Aeronautical Materials

摘　　要：采用电火花沉积+微弧氧化的方法在GH4169合金表面制备ZrO_2/NiCrAlY涂层,制备过程为:采用电火花沉积技术在GH4169基体表面先沉积厚度为250μm的NiCrAlY涂层,再沉积厚度为150μm的Zr涂层,最后通过微弧氧化的方法将Zr涂层氧化成ZrO_2涂层,从而得到ZrO_2/NiCrAlY涂层。采用Qauta 200F型场发射扫描电镜观察涂层的显微组织和形貌,研究ZrO_2/NiCrAlY涂层在不同温度下的热震性能,结果表明:当热震温度分别为750℃,850℃,950℃时,热震失效次数分别为51次、32次和19次,涂层的热震性能良好。Electric spark deposition （ESD） combining with micro-arc oxidation （MAO） were employed to fabricate ZrO2/NiCrAlY thermal barrier coating （TBC） on GH4169 substrate. Firstly, a NiCrAlY coating with thickness of 250 μm was deposited on GH4169 substrate by ESD. Secondly, a Zr coating with thickness of 150 μm was deposited on NiCrAlY coating followed by MAO of the Zr coat-ing. The thermal shock performances of the coatings under different temperatures were investigated. The results indicate that the ther-mal cycle numbers of the coatings at 750℃ , 850 ℃ and 950℃ are 51, 3 2 ,and 19 respectively.

关 键 词：电火花沉积 微弧氧化 涂层 热震性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]