Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10140286 | Composites Part B: Engineering | 2019 | 13 Pages |
Abstract
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 1000â¯Â°C of carbon-phenolic composites is increased by 148.2% after introducing 20â¯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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Authors
Jie Ding, Jiamin Sun, Zhixiong Huang, Yanbing Wang,