ABSTRACT With the development of rocket and aerospace technology in recent decades, people have put forward higher requirements on the heat resistance and ablation performance of thermal protection materials. In this paper, zirconia fibre hybrid alumina fibre/boron phenolic (ZA/BPF) ceramifiable composites, based on ceramic fillers of MgO, Al2O3, SiC and mica-modified boron phenolic resin matrix, were prepared with different hybrid fibre contents (5, 10, 15, 20, 25, 30 wt-%) by hot compression moulding. The result shows that fibre contents have little effect on the ablation resistance of composite materials which all have a low linear ablation rate below 0. 01 mm s−1. When the fiber content is 25%, the ZA/BPF composite reaches the highest bending strength 48. 86 MPa and 15. 57 MPa before and after sintering respectively. It is showed by the SEM results that too high and too low fibre content would both lead to poor bonding between resin and fibre interfaces.

中文翻译：

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纤维含量对陶瓷化复合材料性能的影响

摘要 随着近几十年来火箭和航天技术的发展，人们对热防护材料的耐热性和烧蚀性能提出了更高的要求。本文以氧化镁、氧化铝、碳化硅和云母改性硼酚醛树脂为陶瓷填料，制备了不同混合纤维含量的氧化锆纤维杂化氧化铝纤维/硼酚醛（ZA/BPF）陶瓷化复合材料（5、10 , 15, 20, 25, 30 wt-%)通过热压成型。结果表明，纤维含量对复合材料的耐烧蚀性影响不大，在0. 01 mm s-1以下均具有较低的线性烧蚀率。当纤维含量为25%时，ZA/BPF复合材料烧结前后的最高弯曲强度分别达到48. 86 MPa和15. 57 MPa。