Tracking ceramic toughness under extreme heat. (IMAGE)
Caption
Tracking ceramic toughness under extreme heat. This graphical summary shows how two-dimensional plain-woven SiCf/SiC composites were tested and analyzed under high-temperature conditions. Using SENB tests, the team measured fracture toughness from room temperature to 1500 ℃ in argon and air. The results show a gradual decline in toughness with rising temperature, with air causing stronger degradation due to oxidation. Microscopic images reveal key failure mechanisms, including fiber bridging, fiber pull-out, interface debonding, fiber oxidation, and matrix oxidation. Together with model predictions, the findings clarify how temperature and atmosphere jointly govern damage evolution in ceramic matrix composites for high-temperature aerospace applications.
Credit
Acta Mechanica Sinica
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Acta Mechanica Sinica
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