Abstract

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Title:: Ablation Behavior and Mechanism of C/C ZrC Composites under Oxyacetylene Torch Flame

Author(s):: YANG Xin; SU Zhean; HUANG Qizhong; CHENG Jianxun; (State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China)

Abstract:: To improve the ablation resistance of C/C composites in severe environment, C/CZrC composites were fabricated by innermodification method via introducing ZrC into C/C composites. The effect of ZrC content and ablation time on ablation property of C/CZrC composites was investigated by oxyacetylene torch flame test, and the structure of C/CZrC 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 ZrO2 films in the ablation process.