Abstract

Thermal gravimetry and differential thermal analysis are used to study nonisothermal hightemperature oxidation of 56 wt.% ZrB2–44 wt.% MoSi2 and 86 wt.% ZrB2–14 wt.% MoSi2 ceramics in air up to 1600 °C. Oxide layers that form on samples at different oxidation stages are studied using AES, EDX, and SEM analyses. It is concluded that the ZrB2–MoSi2 ceramics exhibit exceptionally high oxidation resistance.

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