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采用两种热障涂层材料分别是纳米8% Y2O3-ZrO2(以下简称为YSZ)和在8% Y2O3-ZrO2中掺杂25%的纳米CeO2(以下简称为CSZ),应用大气等离子喷涂技术在GH30高温合金钢表面上制备了YSZ和CSZ隔热涂层,测试了两种涂层在950℃时耐Na2SO4熔盐腐蚀的能力,使用SEM、XRD和EDS技术对涂层的失效机理进行了分析,结果表明:腐蚀60 h后,YSZ涂层大面积脱落并且出现了t-ZrO2→m-ZrO2转变,而CSZ涂层基本无脱落,保持t-ZrO2.CSZ阻止腐蚀介质进去涂层的能力强于YSZ,抗高温熔盐腐蚀性能优于YSZ.

参考文献

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