热障涂层的制备及热震性能

发布时间：2018-05-30 15:45

  本文选题：电火花沉积 + 微弧氧化　； 参考：《航空材料学报》2017年02期

【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。
[Abstract]:ZrO_2/NiCrAlY coatings were prepared on the surface of GH4169 alloy by micro-arc oxidation by EDM deposition. The preparation process was as follows: the NiCrAlY coating with 250 渭 m thickness and Zr coating with 150 渭 m thickness was deposited on the GH4169 substrate by EDM technique. Finally, Zr coating was oxidized to ZrO_2 coating by micro-arc oxidation, and ZrO_2/NiCrAlY coating was obtained. The microstructure and morphology of the coating were observed by Qauta 200F field emission scanning electron microscope. The thermal shock properties of the ZrO_2/NiCrAlY coating at different temperatures were studied. The results showed that the thermal shock temperature was 750 鈩，

本文编号：1955838