(Yb0.25Lu0.25Er0.25Y0.25)2Si2O7高熵硅酸盐热环境障涂层的性能研究

被引：0
|
作者：
王泽通
董淑娟
毛传勇
蒋佳宁
邓龙辉
曹学强
机构：
[1] 武汉理工大学硅酸盐建筑材料国家重点实验室
来源：
中国稀土学报 | 2024年 / 42卷 / 04期
关键词：
高熵化设计; 热环境障涂层(TEBCs); 相稳定性; 高温水氧腐蚀; 热循环; 焦硅酸盐; 稀土;
D O I：
暂无
中图分类号：
TG178 [各种金属及合金的腐蚀、防腐与表面处理]; V263 [航空发动机制造];
学科分类号：
摘要：
通过高熵化设计制备了一种新型焦硅酸盐涂层材料(Yb0.25Lu0.25Er0.25Y0.25)2Si2O7，采用大气等离子喷涂（APS）在碳化硅纤维增强碳化硅陶瓷复合材料（SiC_f/Si C-CMCs）表面制备了(4RE0.25)2Si2O7一体化热环境障涂层（TEBCs）体系和LaMgAl11O19/Lu2Si2O7热/环境障涂层（T/EBCs）体系。通过研究两种涂层体系的微观结构、热物理性能、水氧腐蚀性能以及热循环寿命等结果发现：APS制备的(4RE0.25)2Si2O7涂层从室温到1500℃为稳定的β相，(4RE0.25)2Si2O7涂层不存在成分偏析，热导率和热膨胀系数相对Lu2Si2O7涂层有所降低，更适合作为一体化TEBCs使用；(4RE0.25)2Si2O7 TEBCs体系的水氧腐蚀寿命高于80 h,LaMgAl11O19/Lu2Si2O7 T/EBCs体系的水氧腐蚀寿命低于80 h;(4RE0.25)2Si2O7 TEBCs体系的热循环寿命为168次；高熵化设计使焦硅酸盐涂层CTE适配度提高，断裂韧性增强，进而增加了TEBCs体系的热循环寿命。
引用
收藏
页码：752 / 761
页数：10
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