基于TGO进化的EB-PVD结核病的裂传播行为研究
Lulu Wang1,2, Jinying Zhan2,3, Yankuan Liu4
1Shenyang University of Technology, Shenyang, 110870, China.
Scientific reports
|October 16, 2023
概括
这项研究调查了在氧化过程中8%的伊特里亚稳定 (8YSZ) 热屏障涂层 (TBC) 中的裂纹传播. 热生长的氧化物 (TGO) 进化显著影响裂行为和TBC失败机制.
科学领域:
- 材料科学 材料科学 材料科学
- 表面工程是什么?表面工程是什么?
- 高温材料 高温材料
背景情况:
- 热屏障涂层 (TBC) 保护关键的高温组件免受故障.
- 了解TBC中的裂纹传播对于延长组件寿命至关重要.
- 8%的伊特里亚稳定 (8YSZ) 是一种常见的TBC材料.
研究的目的:
- 在1100°C的各种氧化条件下检查8YSZ EB-PVD TBCs的裂传播行为.
- 分析热培养氧化物 (TGO) 进化对裂传播的影响.
- 为了研究界面和侧面裂传播的潜在机制.
主要方法:
- 在1100°C的氧化实验.
- 扫描电子显微镜 (SEM) 用于裂形态分析.
- 使用等效厚度,弹指数和粗度指数量化TGO演变的量化.
主要成果:
- 界面裂形态和TGO演变的特征.
- TGO的增长与裂传播有直接的相关性.
- 侧面裂传播由界面裂性解释,裂偏移由能量释放率解释.
结论:
- TGO进化是8YSZ TBC中裂传播的主要驱动因素.
- 界面断裂性和能量释放率决定了裂的行为.
- 这项研究为改善材料设计提供了对TBC降解机制的见解.
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