热障涂层的制备及热震性能

航空材料学报, 2017, 37(2): 44-48. doi: 10.11868/j.issn.1005-5053.2016.000081

热障涂层的制备及热震性能

王令双 ^1, , 曹国剑 ^2, , 唐光泽 ^3, , 许万娇 ^4, , 马欣新 ^5,

1.哈尔滨理工大学材料科学与工程学院,哈尔滨,150080

2.哈尔滨理工大学材料科学与工程学院,哈尔滨,150080

3.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

4.哈尔滨理工大学材料科学与工程学院,哈尔滨,150080

5.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

关键词：电火花沉积 , 微弧氧化 , 涂层 , 热震性能

Preparation and Thermal Shock Performance of ZrO2/NiCrAlY Thermal Barrier Coating

Keywords： electric spark deposition(ESD) , micro-arc oxidation , coating , thermal shock performance

采用电火花沉积+微弧氧化的方法在GH4169合金表面制备ZrO2/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250 μm的NiCrAlY涂层,再沉积厚度为150 μm的Zr涂层,最后通过微弧氧化的方法将Zr涂层氧化成ZrO2涂层,从而得到ZrO2/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ZrO2/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 coating.The thermal shock performances of the coatings under different temperatures were investigated.The results indicate that the thermal cycle numbers of the coatings at 750℃,850 ℃ and 950℃ are 51,32,and 19 respectively.

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