Study on the oxidation mechanism of the coated C/C composites

The oxidation process and mechanism of the coated C/C composites were studied by the high temperature oxidation test in this paper. The results showed that the oxidation of the coated C/C composites could be divided into four steps. Firstly the oxidation loss was controlled by the reaction between the coated C/C composites and oxygen. Secondly the oxidation loss was controlled by the producing and vaporing rate of the glass. The oxidation loss was lined with the oxidation time. Thirdly there were cracks in the coating and the deep of the coating was oxidated. The weight loss rate increased linearly and the matrix had been oxidated partly in the end.