材料科学
腐蚀
钙长石
陶瓷
尖晶石
冶金
烧结
磷灰石
矿物学
地质学
作者
Zesen Li,Xinyi Li,Wei Wang,Sumei Zhao,Xiaolong Chen,Xiancheng Zhang
标识
DOI:10.1016/j.corsci.2024.111888
摘要
Conventional thermal barrier coatings (TBCs) are susceptible to degradation by molten calcium–magnesium–aluminum-silicates (CMAS) at high temperature. In this work, Gd4Al2O9 ceramics is proposed as a CMAS-resistant material for TBCs and hot corrosion behavior under CMAS attacks have been investigated. Spark plasma sintering Gd4Al2O9 ceramic bulk specimens show high CMAS-resistance at high temperature range 1260–1500 °C. The hot corrosion products are Ca2Gd8(SiO4)6O2 apatite, CaAl2Si2O8 anorthite and MgAl2O4 spinel. The formation of hot corrosion products can consume a portion of CMAS, and block the voids in the ceramic bulk, preventing the melt form penetrating the interior of the ceramic bulk.
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