采用等离子喷涂方法(APS)在GH30高温合金表面分别制备了纳米ZrO2-8%Y2O3 (YSZ,质量分数)和掺杂25%(质量分数)纳米CeO2的三元CeO2/ZrO2-8%Y2 O3 (CSZ)热障涂层.使用FESEM和XRD分析了涂层的微观组织,研究了CSZ涂层在1100℃加热条件下分别保温不同时间及固定加热时间10 h,改变加热温度时涂层晶粒尺寸的变化情况,测试了2种涂层在高温下的耐Na2SO4熔盐腐蚀能力.结果表明,CSZ涂层在高温长时间加热时,平均晶粒尺寸从喷涂态的45 nm增至63 nm,变化较小,在900℃,Na2SO4熔盐腐蚀条件下长时间加热无m-ZrO2相析出,耐蚀性能要高于YSZ涂层.
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