Microstructure and Mechanical Properties of C/C–ZrC–SiC Composites Fabricated by Reactive Melt Infiltration with Zr, Si Mixed Powders
Microstructure and Mechanical Properties of C/C–ZrC–SiC Composites Fabricated by Reactive Melt Infiltration with Zr, Si Mixed Powders
复制标题
DOI：
10.1016/j.jmst.2013.05.005
复制
发表时间：
2013-07
影响因子：
10.9
通讯作者：
Xin Yang;Zhean Su;Qizhong Huang;Xiao-Nan Fang;L. Chai
中科院分区：
文献类型：
--
作者：
Xin Yang;Zhean Su;Qizhong Huang;Xiao-Nan Fang;L. Chai
为了满足未来热防护系统对工作温度在2000℃以上的先进材料的日益增长的需求，以锆、硅混合粉末为原料，采用反应熔渗法(RMI)制备了C/C-ZRC-SiC复合材料。讨论了C/C-ZrC-SiC复合材料的结构演变和形成机理，并通过压缩试验研究了材料的力学性能。结果表明，经RMI工艺处理后，形成了以ZRC-SiC复合涂层为外层、以ZRC-SiC-PYC陶瓷为内层的特殊组织结构。在RMI过程中，由于生成了Zr-Si金属间化合物，在复合材料和涂层表面形成了富ZRC和富SiC的区域。力学性能测试表明，C/C-ZrC-SiC复合材料的平均压缩强度为133.86℃/Mpa，复合材料中的碳纤维在热压成型后没有受到严重损伤。
To meet the increasing demand for advanced materials capable of operation over 2000 °C for future thermal protection systems application, C/C–ZrC–SiC composites were fabricated by reactive melt infiltration (RMI) with Zr, Si mixed powders as raw materials. The structural evolution and formation mechanism of the C/C–ZrC–SiC composites were discussed, and the mechanical property of the as-prepared material was investigated by compression test. The results showed that after the RMI process, a special structure with ZrC–SiC multi-coating as outer layer and ZrC–SiC–PyC ceramics as inner matrix was formed. ZrC and SiC rich areas were formed in the composites and on the coating surface due to the formation of Zr–Si intermetallic compounds in the RMI process. Mechanical tests showed that the average compression strength of the C/C–ZrC–SiC composites was 133.86 MPa, and the carbon fibers in the composites were not seriously damaged after the RMI process.