期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 186, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2019.107916
关键词
Polymer-matrix composites (PMCs); Carbon nanotubes; Thermal properties; Scanning electron microscopy (SEM)
资金
- National Natural Science Foundation of China [51576165,51876177]
Mechanistic investigation of the effect of nanofillers on the ablation of composites is essential to meet the demand for high-performance ablative composites. Ethylene propylene diene monomer (EPDM) composites with and without 5 wt% multi-walled carbon nanotubes (MWCNTs) are prepared, and their ablation rates are tested using a solid rocket motor. The carbothermal reduction reaction during ablation is studied using a high-temperature tube furnace. The carbothermal reduction reaction of silica at high temperature results in a large consumption of char, and is an important reaction affecting the ablation process. The addition of MWCNTs increases the char residue of EPDM composites. MWCNTs can enhance the rate-limiting reaction, thereby reducing the released gas and increasing the production of SiC. The network structure of MWCNTs in char has a directional effect on the in-situ formation of SiC W , which can improve the ablation resistance of composite.
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