无机材料学报2011，Vol.26Issue(6)：669-672,4.DOI:10.3724/SP.J.1077.2011.10918
ZrB2改性C/C复合材料微观结构及烧蚀性能的研究
Microstructure and Ablation Behavior of C/C Composites Doped with ZrB2
摘要
Abstract
ZrB2 was first introduced into carbon preforms through ultrasonic and vacuum immersion-carbonthermal reduction method. After densification using thermal gradient chemical vapor infiltration and graphitization, ZrB2 doped C/C composites were prepared. The oxyacetylene ablation results show that the linear and mass ablation rates of the composites after doping with 6.87wt% ZrB2 decreased by 64.9% and 67.5%, respectively. The ablation of C/C composites is mainly controlled by thermochemical and thermophysical reactions and mechanical denudation does not play a dominant role. The evaporation of ZrO2/B2O3 during ablation would take away large amounts of heat, reducing the thermal impact of flame to the ablation surface.关键词
烧蚀/ZrB2/C/C复合材料/ZrO2Key words
ablation/ZrB2/C/C composites/ZrO2分类
通用工业技术引用本文复制引用
孙慧慧,李贺军,沈学涛,曹高翔,强新发,任晓斌,付前刚..ZrB2改性C/C复合材料微观结构及烧蚀性能的研究[J].无机材料学报,2011,26(6):669-672,4.基金项目
National Natural Science Foundation of China (50832004,90716024) （50832004,90716024）
the "111" Project (08040) （08040）
