Advanced Functional Materials·· 1 天前精选AI 评分60
富硼前驱体 600°C 低温陶瓷化在莫来石纤维表面构建自适应增强层
Low‐Temperature Construction of Self‑Strengthening, Reusable, Ultralight Mullite Fiber Composites with Fish‑Scale‑Like Adaptive Boron‑Rich Layers
AI 导读
研究者在 600°C 下利用富硼前驱体的低温陶瓷化，在莫来石纤维表面与节点处原位构建鱼鳞状自适应陶瓷增强层（ACRL）。该复合材料在 420°C 循环压缩中表现出热机械循环诱导增强，100 次循环后平均模量接近三倍；原位 SEM 显示相邻纤维段发生局部位移与节点重构，粘性软化的 ACRL 起到动态高温焊料作用，重构载荷传递网络。
推荐理由
原文给出循环压缩下模量随次数上升的数据与节点重构的原位 SEM 观察，读者可据此判断这类可复用热防护材料的服役行为。
创新点
把循环热机械载荷从损伤来源转为结构增强驱动力：富硼前驱体低温陶瓷化形成的粘性软化增强层在循环中充当动态高温焊料，桥接纤维接触并重构载荷传递网络，实现循环次数增加而模量上升。
图表、补充材料与最终表述以原文为准。阅读原文
来源：Advanced Functional Materials · doi.org
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