在2.5D编织C/SiC复合材料中氧化诱导降解的预测构成模型
Tao Wu1,2, Yukang Wang1,2, Wenxuan Qi1,2
1Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Materials (Basel, Switzerland)
|January 28, 2026
概括
在高温下,氧化会降解陶基质复合材料 (CMCs). 这项研究开发了一种模型,预测C/SiC复合材料的氧化效应,从而实现更好的设计和寿命评估.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 复合材料 复合材料 复合材料
背景情况:
- 氧化导致陶矩阵复合材料 (CMC) 在高温服务期间的降解和承载能力的丧失.
- 这种降解损害了CMC制成的组件的结构完整性和操作安全性.
- 了解氧化机制对于可靠的性能评估至关重要.
研究的目的:
- 阐明2.5D编织C/SiC纤维捆上的氧化效应的机制.
- 为在氧化条件下开发CMC机械性能的预测模型.
- 为可靠的C/SiC组件的设计和寿命评估提供基于物理的基础.
主要方法:
- 使用气体扩散和氧化动力学理论预测氧气扩散系数.
- 构建中尺度和微尺度构成模型,包括氧化损伤,纤维缺陷和界面滑动.
- 使用X射线计算机断层扫描重建开发了一个代表体积元素 (RVE) 模型.
- 通过高温氧化试验 (700-1100°C) 提出并验证了一种氧化构成模型.
主要成果:
- 开发的模型有效地描述了由于氧化而导致的强度降解和刚度降低.
- 在氧化条件下精确预测CMC的机械性能.
- 该模型证明了对装载-卸载周期的适用性.
结论:
- 这项研究为2.5D编织的C/SiC复合材料提供了一种经过验证的氧化构成模型.
- 该模型可以预测氧化环境下机械性能降解的情况.
- 这些发现支持C/SiC组件在高温应用中的可靠设计和寿命评估.
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