中文摘要：

采用Lu2O3／TiO2／Nb2O5作为ZrO2热障涂层材料的稳定剂，研究Lu2O3／TiO2／Nb2O5共稳定ZRO2（15％LTNSZ）热障涂层材料在900℃、40m01％V2O5＋60m01％Na2S04熔盐中的热腐蚀行为。结果表明：8％YSZ热障涂层材料热腐蚀2h后，t相ZrO2全部相变为m相ZrO2，热腐蚀产物为尺寸较大的YVO4晶体；15％LTNSZ热障涂层材料热腐蚀20h后，m相ZrO2的比例仅为5．5％，热腐蚀产物为尺寸较小的LuVO4晶体。与Y2O3稳定剂相比，Lu2O3／TiO2／Nb2O5稳定剂使ZrO2在40mol％V2O5＋60mol％Na2S04熔盐中的抗热腐蚀性能提高1个量级以上。

英文摘要：

Hot corrosion is one of the main destructive factors in thermal barrier coatings （TBCs） of ZrO2 stabilized by 8wt%W2O3 （8%YSZ）, which comes as a result of molten salt effect on the coating-gas interface. In this study the hot corrosion behavior of Lu2O3/TiO2/Nb2O5 co-doped ZrO2 （15%LTNSZ） and 8%YSZ in molten salt of 40mol%V2O5＋60mol%Na2SO4 was evaluated. The results show that the molten salt reacts with Y2O3 and causes complete transformation of tetragonal ZrO2 into monoclinic phase and production of large dendritic YVO4crystals for 8%YSZ TBCs at 900 ℃ for 2 h. For 15%LTNSZ TBCs at 900 ℃ for 20 h, the molten salt reacts with Lu2O3 difficultly and almost does not react with TiO2 and Nb2O5, and cause transformation of tetragonal ZrO2 of 5.5%volume fraction into monoclinic phase and production of small dendritic LuVO4 crystals. 15%LTNSZ has an outstanding hot corrosion resistance to molten salt of 40 mol%V2O5＋60 mol% Na2SO4