ZrB2 doped into the matrix of carbon-based composite materials was investigated. Modified carbon-
based composite materials were prepared through hot-pressing molding and carbonation treatment. After static oxida
tion experiment at 1 500益,the sample with ZrB2 showed a better anti-oxidation performance. SEM observation results
showed that the samples surface formed dense oxidation layer, which inhibited the oxygen from diffusing into the ma
trix. Moreover, the chemical reaction mechanism in the high temperature oxidation process of composite material was
studied through the thermodynamic calculation.