在 (Hf,Zr,Ti) B2上的功能分级氧化物尺度,涂层具有独特的Ti溶解诱导的异常消化阻力
Junshuai Lv1, Wei Li1, Yanqin Fu2
1Shaanxi Key Laboratory of Fiber Reinforced Light-Weight Composites, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|January 15, 2025
概括
添加 (Ti) 显著增强了极高温陶 (UHTCs) 的极高温应用. Ti通过提炼谷物结构和创建具有优越裂纹抑制的保护性氧化物尺度来提高除阻力.
科学领域:
- 材料科学 材料科学 材料科学
- 陶工程 陶工程 陶工程
- 高温材料 高温材料
背景情况:
- 超高温陶 (UHTCs) 对于超过2000°C的应用至关重要.
- 含 (Ti) 的超高温电阻表现出增强的剥离电阻,但机制尚不清楚.
- 了解Ti的作用对于开发先进的热保护系统至关重要.
研究的目的:
- 为了研究含量对 (Hf,Zr,Ti) B2涂层的剥离性能的影响.
- 阐明Ti提高消磨阻力的机制.
- 为极端温度环境优化UHTC.
主要方法:
- 使用超音速大气等离子体喷射制造 (Hf,Zr,Ti) B2涂层.
- 在大约2200°C的氧乙烯火焰下进行了废弃试验.
- 结果的氧化物尺度的微结构分析.
主要成果:
- (Hf0.45Zr0.45Ti0.10) B2涂层表现出优越的剥离阻力和循环可靠性.
- 一个功能分级的氧化物尺度形成,有一个密集的外层和一个细颗粒的内部层.
- 溶解提炼了谷物,释放了应力,形成了一个转移稳定的立方氧化物尺度,抑制了裂的传播.
结论:
- 在UHTC中加入Ti可以创建一个强大的氧化物尺度,具有出色的氧气屏障特性和高应变耐受性.
- 离子在纳米尺度上的独特溶解行为是改善废除电阻的关键.
- 这项研究提供了对含有Ti的多元组件UHTCs的废弃机制的关键见解.
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