CAJ | 학술논문

采用等离子喷涂制备了双层YSZ/铈锆酸镧(La2(Zr0.7Ce0.3)2O7,LZ7C3)涂层,采用扫描电子显微镜(SEM)、X射线衍射分析(XRD)等研究了涂层的结合强度、高温抗热震性能、抗钙镁铝硅酸盐玻璃(CMAS)侵蚀性能等.结果表明:沉积态涂层呈现萤石结构;涂层与基体的最高结合强度达到了38Mpa以上;双层涂层在1200℃的热震次数达到33次;涂层失效方式主要为外层铈锆酸镧涂层发生了逐层剥离;LZ7C3可与CMAS形成高熔点的结晶物,抵抗CMAS的入侵.双层YSZ/铈锆酸镧涂层具有良好的抗热震和抗CMAS性能.
채용등리자분도제비료쌍층YSZ/시고산란(La2(Zr0.7Ce0.3)2O7,LZ7C3)도층,채용소묘전자현미경(SEM)、X사선연사분석(XRD)등연구료도층적결합강도、고온항열진성능、항개미려규산염파리(CMAS)침식성능등.결과표명:침적태도층정현형석결구;도층여기체적최고결합강도체도료38Mpa이상;쌍층도층재1200℃적열진차수체도33차;도층실효방식주요위외층시고산란도층발생료축층박리;LZ7C3가여CMAS형성고용점적결정물,저항CMAS적입침.쌍층YSZ/시고산란도층구유량호적항열진화항CMAS성능.
A double layered YSZ/La2(Zr0.7Ce0.3)2O7(LZ7C3) thermal barrier coating was prepared by a plasma spraying method. Its bond strength, thermal shock resistance at high temperature and calcium-magnesium-aluminum-silicate glass (CMAS) corrosion resistance were studied using scanning electron microscopy (SEM), X-ray diffraction analysis (XRD) and other methods. Experimental results show that the as-deposited coating exhibits a fluorite structure with a bond strength higher than 38MPa. The thermal shock life of the double layered coating at 1200℃ were 33 cycles, which mainly failed in a mode of layer by layer peeling of the outer La2(Zr0.7Ce0.3)2O7 coating. The LZ7C3 can react with CMAS to form a solid crystalline phase with high melting point, thereby resisting the CMAS invasion. In conclusion, the double layered YSZ/LZ7C3 thermal barriercoating has good thermal shock and CMAS corrosion resistances.