Promoting Yb2Si2O7 environmental barrier coatings for service at 1425 ° C

被引：2

作者：

Chen, Lin ^{[1
]}

Li, Shu-Wen ^{[1
]}

Li, Chang-Jiu ^{[1
]}

Yang, Guan-Jun ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Mat Sci & Engn, Natl Key Lab Mech Behav Mat, Xian 710049, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2025年 / 45卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Environmental barrier coatings; Bond coat; Oxidation; Phase transition; Cracking; THERMAL-PROPERTIES; OXIDATION; BEHAVIOR;

D O I：

10.1016/j.jeurceramsoc.2025.117200

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Si-based environmental barrier coatings (EBCs) are indispensable for SiC composites. However, the service temperature of next-generation composites exceeds 1400 degrees C, leading to melting of the Si bond coat. To mitigate this issue, Yb2Si2O7 (YbDS) and mullite/YbDS coatings without Si bond coat were proposed. The results indicate that YbDS coatings can survive for 150 h at 1425 degrees C, while mullite/YbDS coatings experienced significant spallation during this period. Both SiO2 phase transition and interfacial holes cause spallation of the YbDS and mullite/YbDS coatings. This research provides valuable insights for designing next-generation EBCs.

引用

页数：10

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