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The oxidation performance of ZrB 2 –SiC ultra-high temperature ceramics with SiC content ranging from 20 to 80vol% has been evaluated at 1773K for 50h and at 2073K for 20min. Oxidation reaction pathways were interpreted using volatility diagrams of the ZrB 2 –SiC system. At 1773K for 50h, all ZrB 2 –SiC composites from 20 to 80vol% SiC formed a protective SiO 2 surface...
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