摘要
针对目前常用的碳/碳复合材料基体改性方法中存在的缺陷,采用可溶性ZrOC l2.8H2O为改性添加剂前驱体,利用Zr与碳基体之间的原位反应制备了ZrC改性碳/碳复合材料。借助氧乙炔烧蚀实验,研究了所得试样的抗烧蚀行为;用X-射线衍射和扫描电子显微镜检验观察了改性前后毡基碳/碳复合材料的氧化形貌和Zr的存在形式。结果表明:原位合成法工艺简单、成本低;ZrC颗粒尺寸细小、在碳基体中分布均匀;与改性前的试样相比,由5.0%ZrC改性的C/C复合材料氧化烧蚀率降低了81.3%,具有优异的抗氧化烧蚀和抗冲刷性能。
Adopting soluble ZrOCl2·8H2O as modification additive precursor, ZrG modified carbon-carbon （C/C） composites were fabricated via the in situ reaction between zirconium and carbon matrix. The anti-ablation beha- viors of the specimen were investigated by oxygen-acetylene firing experiment, and the oxidation condition and zir- conium distribution in the felt based C/C composites with and without modification were observed by X-ray diffrac- tion （XRD） and scanning electronic microscopy （SEM）. The results show that ZrC, in shape of small particles, distributes uniformly in carbon matrix. The oxidation-ablation ratio of the 5.0% ZrC modified C/C composites is re- duced by 81.3%, indicating an excellent anti-ablation and abrasion resistance ability. Moreover, in situ synthesis attracts with its simple process and low cost.
出处
《机械科学与技术》
CSCD
北大核心
2009年第2期218-221,共4页
Mechanical Science and Technology for Aerospace Engineering
基金
陕西省教育厅专项基金项目(07JK178)
宝鸡文理学院重点科研项目(Zk065)资助
关键词
碳/碳复合材料
原位合成
基体改性
烧蚀
carbon/carbon composites
in situ synthesis
matrix modification
ablation
