Significant improvement of the self-protection capability of ultra-high temperature ceramic matrix composites

•Short term oxidation tests at 1500 °C and 1650 °C were carried out on UHTCMC.•Less than 30 vol% of ZrB2 into SiC(O) matrix is able to impart a fast passivation.•Oxidation resistance was affected by the distribution of ZrB2 into the SiC matrix. The oxidation behaviour of Cf/ZrB2-SiC with different f...

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