超高温陶合无机聚合物用于热结构纤维增强复合材料
Valentina Medri1, Annalisa Natali Murri1, Elettra Papa1
1National Research Council, Institute of Science, Technology and Sustainability for Ceramics (CNR-ISSMC), Via Granarolo 64, 48018 Faenza, Italy.
Materials (Basel, Switzerland)
|October 28, 2023
概括
新的陶基质增强了复合材料在高温下的稳定性. 碳化物颗粒提高了热性能,防止胀和空隙形成,以获得更好的纤维粘附性.
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
- 复合材料 复合材料 复合材料
背景情况:
- 纤维增强复合材料需要具有增强高温稳定性的矩阵,用于苛刻的应用.
- 性酸聚合物为先进的复合材料矩阵提供了潜在的基础.
研究的目的:
- 开发用于纤维增强复合材料的新型无机纳米结构矩阵.
- 使用超高温陶 (UHTC) 颗粒来提高性酸基质的高温稳定性.
主要方法:
- 在室温下合成的性酸矩阵具有高SiO2:Al2O3比率.
- 含有45%至5%SiC,ZrB2,ZrC和HfC粉末的多矩阵.
- 在750°C时将热稳定矩阵作为玻璃陶,并在1000°C的热循环后对其进行了特征化.
主要成果:
- 基于碳化物的UHTC颗粒 (SiC,ZrC,HfC) 显著改善了矩阵的热稳定性.
- 碳化物合剂在1000°C时防止过度胀和有害的空隙形成.
- ZrB2 兴奋剂导致过度的矩阵胀,与未兴奋剂矩阵相比降低了其疗效.
- 在C-纤维织物浸试验中,碳化物合的矩阵表现出良好的可加工性,纤维粘附性和断裂拉出能力.
结论:
- 性酸矩阵与碳化物基UHTC合,为纤维增强复合材料提供了增强的高温稳定性.
- 这些新型矩阵表现出改善的附着性和机械完整性,这对于先进的材料应用至关重要.
- 选择UHTC兴奋剂至关重要,因为ZrB2由于过度胀而被证明是无效的.
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