(State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China)
Keywords:
-
CLC:
PACS:
-
DOI:
-
DocumentCode:
Abstract:
To improve the ablation resistance of C/C composites in severe environment, C/CZrC composites were fabricated by innermodification method via introducing ZrC into C/C composites. The effect of ZrC content and ablation time on ablation property of C/CZrC composites was investigated by oxyacetylene torch flame test, and the structure of C/CZrC composites after ablation was studied by XRD and SEM analysis. The results show that the introduction of ZrC into C/C composites can effectively reduce the linear ablation rate and mass ablation rate of C/C composites, and relative high ZrC content is favorable for improving the ablation resistance of C/C composites. As ablation time increased, the linear ablation rate and mass ablation rate are further reduced. The improvement of ablation resistance is mainly attributed to the formation of ZrO2 films in the ablation process.