ZrB_2和POSS对碳布/酚醛复合材料烧蚀性能的影响

Effect of ZrB_2 and POSS on Ablation Properties of Carbon Fabric/Phenolic Composite

以ZrB2为改性剂,采用热压工艺制备了碳布/酚醛复合材料,通过氧/乙炔烧蚀实验对复合材料的烧蚀性能进行了研究,利用扫描电镜和能量色散谱仪对复合材料烧蚀形貌和成分进行了分析。结果表明:经氧/乙炔焰烧蚀后,在复合材料表面形成了一层陶瓷层,其质量烧蚀率为0.04585g/s,线烧蚀率为-0.013mm/s,经二次烧蚀后,复合材料的质量烧蚀率为0.0096g/s。当ZrB2和POSS配合使用改性碳布/酚醛复合材料时,碳布/酚醛复合材料的质量烧蚀率可达0.025g/s,二次质量烧蚀率可达0.0089g/s。

Using ZrB2 as modifier, and adopting hot pressing process, a kind of carbon fabric reinforced phenolic (C/PF) composite was made. The ablation property of the C/PF composite was studied by oxygen/ethyne ablation test. The composite ablation appearance and the composition were analyzed by scanning electron microscope and energy spectrometer respectively after the ablation test. The results show that one ceramic layer is formed on the composite surface after ablated by the oxygen/ethyne flame. The mass ablation rate is 0.04585 g/s and the line ablation rate of the composite is -0.013 g/s. After second ablation, the mass ablation rate is 0.0096 g/s. However, the mass ablation rate can reach 0.025 g/s when the composite is modified by ZrB2 and POSS, the second time mass ablation rate can reach 0.0089 g/s.