Abstract
This study investigated the effect of short carbon fiber (Cf) on the oxidation behavior of ZrB2–SiC composites with fiber volume fractions in the range of 0–20%. Precisely, highly dense composite compacts were manufactured by hot-press process at 2000 °C and 30 MPa for 60min. The addition of Cf increased the relative density of sintered composite The oxidation treatment at 1600 °C in air tube furnace for 0.5 h revealed that oxidation rate of ZrB2–SiC-Cf composites decreased from 292.4 μm/h to 77.6 μm/h (almost 73.5% decline), when the content of Cf changed from 0 to 20%. Moreover, Cf played important roles in blocking and deflecting oxygen diffusion during the oxidation process, which provided a local reduction environment of oxidation products.
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