Journal
COMPOSITES PART B-ENGINEERING
Volume 157, Issue -, Pages 289-294Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2018.08.124
Keywords
Polymer-matrix composites (PMCs); Compression moulding; Thermal stability; High-temperature mechanical property
Funding
- Natural Science Foundation of Hubei Province, PR China [2018CFB360]
- Fundamental Research Funds for the Central Universities, PR China [WUT: 2018III027GX, WUT: 2018IVA005, WUT: 183101008]
- Ministry of Education for Equipment Pre-research, PR China [6141A02022208]
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The effect of TiB2 on the thermal stability of phenolic and the role of TiB2 on the high-temperature mechanical property of carbon-phenolic composites are investigated by introducing TiB2 particles into phenolic, and then TiB2 particles into carbon-phenolic composites. The results show that the thermal stability of phenolic is enhanced by TiB2 additions. And the enhancement in thermal stability of phenolic exhibits a positive effect on improving the high-temperature mechanical property of carbon-phenolic composites. The flexural strength at 1000 degrees C of carbon phenolic composites is increased by 148.2% after introducing 20 wt% TiB2 particles into phenolic matrix. In the heating stage before high-temperature mechanical test, TiB2 particles react with oxygen or oxygen-containing molecules released by phenolic pyrolysis. Therefore, amorphous carbon coated with glassy B2O3 and ceramic particles forms a new compact matrix. The well-bonded interface provides TiB2 modified carbon phenolic improved mechanical performance at high temperature.
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