材料科学
热障涂层
腐蚀
晶界
涂层
渗透(HVAC)
陶瓷
开裂
温度循环
冶金
分层(地质)
复合材料
热的
微观结构
地质学
俯冲
物理
气象学
古生物学
构造学
作者
Zhilin Chen,Zhilin Tian,Liya Zheng,Bin Li
标识
DOI:10.1016/j.jeurceramsoc.2024.04.073
摘要
M-YTaO4 is one of the most promising candidates for the next-generation thermal barrier coatings. However, the CMAS-induced degradation of M-YTaO4 is still in dispute. This work comprehensively investigates the CMAS corrosion of M-YTaO4 at 1300 oC which provides new insights into the corrosion mechanism. CMAS attacks M-YTaO4 forming a thick recession layer and the main corrosion product is accurately confirmed to be (Ca2-xYx)(Ta2-y-zMgyAlz)O7 solid solution. The recession layer presented a small difference in Young's modulus with M-YTaO4. No delamination cracking occurred during the thermal cycling process indicating good reliability. In addition, grain boundary infiltration of CMAS is first revealed in M-YTaO4. The results have corrected the misjudgment of the corrosion mechanism and CMAS infiltration process in previous studies which provides guidelines for the design of M-YTaO4 thermal barrier coatings.
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