Microstructure and ablation behavior of double anti-oxidation protection for carbon-bonded carbon fiber composites

详细信息    查看全文

• 作者：Baosheng Xu^a ; Yumin An^b ; Peng Wang^c ; ^{wangpeng1@126.com" class="auth_mail" title="E-mail the corresponding author} ; Xinxin Jin^d ; ^{au.zn.zn@163.com" class="auth_mail" title="E-mail the corresponding author} ; Guangdong Zhao^b
• 关键词：Carbon-bonded carbon fiber composites ; Ceramic coating ; Oxidation resistance ; Ablation behavior
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：783-790
• 全文大小：2454 K

文摘

To improve the oxidation protective ability of carbon–bonded carbon fiber (CBCF) composites, double anti-oxidation protection for CBCF composites were prepared, i.e., ceramic coating-coated CBCF composites combined with ceramic-modified carbon fiber in CBCF matrix. The ablation behavior of modified CBCF composites was tested under an oxyacetylene flame at 1600 °C for 300 s and 800 s, respectively. The results indicate that the ZrB₂ in matrix and ZrB₂-based ceramic coating can play double protection for CBCF composites during ablation process. The linear ablation rate of the sample after ablation for 300 s and 800 s were −1.1×10⁻⁴ and 8.38×10⁻⁴ cm s⁻¹, respectively. The modified CBCF composites presented excellent oxidation resistance for 300 s. With the increase of the oxidation time for 800 s, the ZrB₂-based ceramic coating experienced catastrophic damage. However, the carbon fiber surface only exhibited some circular pits instead of complete oxidation, implying that the ZrB₂ on the carbon fiber surface improved the anti-oxidation and ablation resistance of CBCF composites.