ZrB2改性C/C复合材料微观结构及烧蚀性能的研究

doi:10.3724/SP.J.1077.2011.10918

无机材料学报 ›› 2011, Vol. 26 ›› Issue (6): 669-672.DOI: 10.3724/SP.J.1077.2011.10918 CSTR: 32189.14.SP.J.1077.2011.10918

• 研究快报 • 上一篇

ZrB₂改性C/C复合材料微观结构及烧蚀性能的研究

孙慧慧, 李贺军, 沈学涛, 曹高翔, 强新发, 任晓斌, 付前刚

(西北工业大学凝固技术国家重点实验室, 西安710072)

收稿日期:2010-12-28 修回日期:2011-03-02 出版日期:2011-06-20 网络出版日期:2011-06-07
基金资助:
National Natural Science Foundation of China (50832004, 90716024); the “111” Project (08040)

Microstructure and Ablation Behavior of C/C Composites Doped with ZrB₂

SUN Hui-Hui, LI He-Jun, SHEN Xue-Tao, CAO Gao-Xiang, QIANG Xin-Fa, REN Xiao-Bin, FU Qian-Gang

(State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China)

Received:2010-12-28 Revised:2011-03-02 Published:2011-06-20 Online:2011-06-07
About author:SUN Hui-Hui(1986-), female, candidate of master. E-mail: sunhuihui4243@126.com
Supported by:
National Natural Science Foundation of China (50832004, 90716024); the “111” Project (08040)

摘要/Abstract

摘要： 采用超声波真空浸渍-碳热还原法将ZrB2引入碳纤维预置体, 结合热梯度化学气相渗透、高温石墨化工艺制备了ZrB₂改性C/C复合材料. 氧-乙炔烧蚀测试结果表明, 添加了6.87 wt% ZrB₂后, C/C复合材料的线烧蚀率和质量烧蚀率分别下降了64.9%和67.5%. 分析表明, C/C复合材料的烧蚀主要是由热化学和热物理反应控制, 机械剥蚀在烧蚀过程中仅起到次要作用. 烧蚀产物ZrO₂/B₂O₃在烧蚀过程中的挥发会带走大量的热, 从而减少了烧蚀火焰对烧蚀表面的热冲击.

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关键词: 烧蚀, ZrB₂, C/C复合材料, ZrO₂

Abstract: ZrB₂ was first introduced into carbon preforms through ultrasonic and vacuum immersion-carbonthermal reduction method. After densification using thermal gradient chemical vapor in-ltration 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.

Key words: ablation, ZrB₂, C/C composites, ZrO₂

中图分类号:

TB332

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.

SUN Hui-Hui, LI He-Jun, SHEN Xue-Tao, CAO Gao-Xiang, QIANG Xin-Fa, REN Xiao-Bin, FU Qian-Gang. Microstructure and Ablation Behavior of C/C Composites Doped with ZrB₂[J]. Journal of Inorganic Materials, 2011, 26(6): 669-672.

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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

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