Improving ablation properties of ceramifiable vitreous silica fabric reinforced boron phenolic resin composites via an incorporation of MoSi 2

Wei Yang, Bo Xu, Man Qi, Daoyuan Chen, Jie Ding, Zhixiong Huang & Yanbing Wang*Key Lab of Advanced Technology for Specially Functional Materials, Ministry of Education, and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, People’s Republic of China CONTACT Yanbing Wang wangyb@whut.edu.cn Key Lab of Advanced Technology for Specially Functional Materials, Ministry of Education, and School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, People’s Republic of China Supplemental data for this article can be accessed https://doi.org/10.1080/14658011.2020.1808758ABSTRACTVarious thermal protective ablative materials (TPAM) have been extensively studied. However, there are few reports on the thermal stability, the ablation properties and ceramisation of vitreous silica fabric reinforced boron phenolic resin composites with an incorporation of MoSi2 (VMBPR) and their bending strength after ablation. At this work, the above performances of the composites were characterised and analysed. Results reveal that the addition of MoSi2 decreases the graphitisation temperature of glass carbon of BPR pyrolysis, promoting the formation of a more ordered structure of the glassy carbon during pyrolysis. Furthermore, compared with the composites without MoSi2 (VBPR), the linear and the mass ablation rate of VMBPR composites decrease by about 94.46% and 39.09%, and its room temperature bending strength after static ablation at 1400°C for 20 min is more than twice that of the fused fibre aggregation formed by VBPR composites. This is attributed to the ceramisation reaction of VMBPR composites at high temperature.