Abstract
The oxidation behaviour in air of a hot-pressed ZrB2–SiC–Cf composite was investigated. Tests from 25 to 1550°C in air were carried out at a rate of 10°C/min and 45°C/min. Then, 6h isothermal runs were conducted in air at 800, 1000, 1200, 1400°C, after heating the samples in argon at 30°C/min. Below 1000°C the kinetics was dominated by an exponential weight loss due to fibre consumption. Above 1000°C, weight loss started to be significantly counterbalanced by weight gain due to the formation of a layer of SiO2 and B2O3. Kinetic parameters were evaluated.
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