Abstract
The linear and parabolic oxidation rate constants and activation energies for SiC fibers available in the literature are reviewed for the first time. Oxidation experiments are also conducted with Hi‐Nicalon SiC fibers over 700–1 300 °C in dry O2 with thermogravimetric analysis. Linear oxidation kinetics are observed from 700 to 800 °C and parabolic kinetics are observed from 900 to 1 300 °C. The linear and parabolic oxidation rate constant activation energies are determined to be 83 and 108 kJ mol−1, respectively. These kinetic results are compared with the literature values. Differences in oxidation behavior are assessed as a function of fiber composition.
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