Reaction kinetics and ablation properties of C/C–ZrC composites fabricated by reactive melt infiltration
Reaction kinetics and ablation properties of C/C–ZrC composites fabricated by reactive melt infiltration
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DOI：
10.1016/j.ceramint.2010.12.002
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发表时间：
2011-05
影响因子：
5.2
通讯作者：
Yiguang Wang;Xiaojuan Zhu;Litong Zhang;Lai-fei Cheng
中科院分区：
文献类型：
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作者：
Yiguang Wang;Xiaojuan Zhu;Litong Zhang;Lai-fei Cheng
采用反应熔渗法制备了碳/碳-碳化锆（C/C-ZrC）复合材料。采用化学气相渗透法对碳纤维毡进行致密化处理，得到多孔碳/碳（C/C）骨架。然后在高于锆熔点的温度下将锆熔体渗透到多孔C/C中以获得C/C-ZrC复合材料。研究了浸渗深度与退火温度和保温时间的关系。在此基础上建立了描述该过程的动力学模型。在氧乙炔焰炬和激光束下测试了C/C-ZrC的烧蚀性能。结果表明，与C/SiC-ZrB 2、C/SiC和C/C复合材料相比，C/C-ZrC复合材料的线烧蚀率和质量烧蚀率均显著降低。在高温下形成致密的ZrC和ZrO 2混合物层是高耐烧蚀性的原因。
Carbon/carbon–zirconium carbide (C/C–ZrC) composites were prepared by reactive melt infiltration. Carbon fiber felt was firstly densified by carbon using chemical vapor infiltration to obtain a porous carbon/carbon (C/C) skeleton. The zirconium melt was then infiltrated into the porous C/C at temperatures higher than the melting point of zirconium to obtain C/C–ZrC composites. The infiltration depth as a function of annealing temperature and dwelling time was studied. A model based on these results was built up to describe the kinetic process. The ablation properties of the C/C–ZrC were tested under an oxyacetylene torch and a laser beam. The results indicate that the linear and mass ablation rates of the C/C–ZrC composites are greatly reduced compared with C/SiC–ZrB2, C/SiC, and C/C composites. The formation of a dense layer of ZrC and ZrO2mixture at high temperatures is the reason for high ablation resistance.