热障涂层
材料科学
润湿
磷灰石
掺杂剂
化学工程
稀土
热的
溶解度
腐蚀
复合材料
冶金
热力学
化学
物理化学
兴奋剂
陶瓷
工程类
物理
光电子学
作者
Lei Guo,Bing Zhang,Yuan Gao,Kai Yan
标识
DOI:10.1016/j.corsci.2023.111689
摘要
Thermal barrier coatings (TBCs) with higher rare earth (RE) contents are more resistant to CaO-MgO-Al2O3-SiO2 (CMAS) attack due to their reaction to form apatite protective products. In this study, the reaction behavior between RE2O3 and CMAS was investigated and their interaction laws were clarified, based on which three criterions for selecting RE dopants for RE-containing TBC materials are proposed: 1) favorable reaction product types and strong protective products formation kinetics, 2) low RE3+ solubility in molten CMAS, and 3) low wettability of residual mixture. Sm2O3 and Gd2O3 are demonstrated as the most attractive dopants for RE-containing TBCs against CMAS attack.
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