Preparation and properties of 2D C/SiC-ZrB2-TaC composites
Preparation and properties of 2D C/SiC-ZrB2-TaC composites
复制标题
2D C/SiC-ZrB2-TaC复合材料的制备及性能
DOI：
10.1016/j.ceramint.2010.10.033
复制
发表时间：
2011-04-01
影响因子：
5.2
通讯作者：
Zhang, Litong
中科院分区：
文献类型：
--
作者：
Li, Lulu;Wang, Yiguang;Zhang, Litong
采用化学气相渗透(CVI)和浆料浆料(SP)相结合的方法制备了二维C/SiC-ZrB_2-TaC复合材料。用聚碳硅烷-ZrB_2-TaC混合浆料堆积碳布制备了二维层压板。在预制件中沿垂直方向引入少量碳纤维丝束。二维层压板经1800℃热处理后，用化学气相沉积(CVI)致密化碳化硅，得到了二维C/SiC-ZrB2-TaC复合材料。研究了复合材料的弯曲强度、层间剪切强度和热膨胀等性能。烧蚀试验是在氧乙炔火焰下进行的。对烧蚀后的样品进行了形貌分析。结果表明，添加垂直纤维丝束，并在1800℃进行热处理，可显著提高复合材料的力学性能。在C/SiC复合材料中加入TaC和ZrB_2粉末，有效地提高了其耐烧蚀性能。(C)2010年爱思唯尔有限公司和Techna Group S.r.l.版权所有。
Two-dimensional (2D) C/SiC-ZrB2-TaC composites were fabricated by chemical vapor infiltration (CVI) combined with slurry paste (SP) method. 2D laminate was prepared by stacking carbon cloth that was pasted with a mixture of polycarbosilane-ZrB2-TaC slurry. A small amount of carbon fiber tows were introduced into the preform in the vertical direction. After heat-treated at 1800 degrees C, the 2D laminate was densified with SiC by CVI to obtain 2D C/SiC-ZrB2-TaC composites. Properties including flexural strength, interlaminar shear strength, and thermal expansion of the composites were investigated. The ablation test was carried out under an oxyacetylene torch flame. The morphologies of the ablated specimens were analyzed. The results indicate that the adding vertical fiber tows and heat-treatment at 1800 degrees C can greatly improve the mechanical properties of the composites. The co-addition of TaC and ZrB2 powders into C/SiC composite effectively enhance its ablation resistance. (c) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.