evolution of microstructure and mechanical properties of pip-c/sic composites after high-temperature oxidation
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2017
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Abstract
C/SiC composites had been prepared by PIP process. The evolution of microstructure and mechanical properties after high-temperature (>1500 °C) oxidation were discussed and compared. The results showed that PIP-C/SiC composites had been severely damaged after oxidation tests, micro-cracks and holes emerged along with the increasing of the oxidation temperature, which lead to the decreasing of mechanical properties. After high-temperature flexural tests, the thermal mismatch between C fibers and SiC matrix gradually caused the expansion of micro-cracks, which lead to the decreasing of flexural strength. The mechanical performance deteriorated because defects in the matrix increased and some fibers were oxidized. For long-time use at higher temperature (≥1600 °C), it was necessary to develop a more protective coating with higher stability and melting temperature.
| Reference Key |
yang2017journalevolution
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|---|---|
| Authors | ;Xiang Yang;Cao Feng;Zhi-hang Peng;Wang Yi;Guang-de Li |
| Journal | offshore |
| Year | 2017 |
| DOI |
10.1016/j.jascer.2017.07.001
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