料浆刷涂针刺法制备C<sub>f</sub>/C-ZrB<sub>2</sub>复合材料及其力学性能

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摘要以天然石墨粉、ZrB₂粉末、醇溶性酚醛树脂粉末及炭纤维毡、炭纤维无纬布为原料,采用料浆刷涂、针刺、温压固化、高温碳化工艺,结合化学气相沉积工艺,制备C_f/C-ZrB₂复合材料。通过阿基米德排水法测试密度及孔隙率,采用扫描电镜分析及力学性能测试等手段,研究料浆固含量对C_f/C-ZrB₂多孔坯体中基体粉末分布的影响,以及对C_f/C-ZrB₂复合材料力学性能的影响。结果表明：料浆固含量增加,坯体中基体粉末分布的均匀性提高,材料力学性能随浆料固含量的增加呈现先升后降的趋势,当料浆固相体积分数为15%时,材料抗弯强度达到121.86 MPa。

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	史琦
	李国栋
	王洋
	姜毅

关键词 ： C_f/C-ZrB₂, 料浆针刺, 复合材料, 化学气相渗透, 抗弯强度

Abstract：In this paper, C_f/C-ZrB₂ composite material was prepared by natural graphite powder, ZrB₂ powder, alcohol-soluble phenolic resin powder, carbon fiber felt, carbon fiber latitude cloth, which involved the processes including slurry brushing, needle punching, temperature and pressure curing, high temperature carbonization process, as well as chemical vapor deposition. Density and porosity were tested by Archimedes drainage method, the impacts of slurry solid content on the distribution of matrix powder in the C_f/C-ZrB₂ porous body and mechanical properties of the composite material were tested by using scanning electron microscopy analysis and mechanical performance testing and other methods. The results show that increasing the solid content of the slurry improves the uniformity of the matrix powder distribution in the green body. The mechanical properties of the material increase first and then decrease with the increase of the solid content. When the volume fraction of the solid phase of the slurry is 15%, the bending strength reaches 121.86 MPa.

Key words： C_f/C-ZrB₂ slurry needling composite material chemical vapor infiltration bending strength

收稿日期: 2021-01-20 出版日期: 2021-07-21

ZTFLH:

TB332

基金资助:轻质高强结构材料国家重点实验室基金项目

通讯作者: 李国栋,教授,博士。电话：13087317973;E-mail: lgd63@163.com

引用本文:

史琦, 李国栋, 王洋, 姜毅. 料浆刷涂针刺法制备C_f/C-ZrB₂复合材料及其力学性能[J]. 粉末冶金材料科学与工程, 2021, 26(3): 278-284.
SHI Qi, LI Guodong, WANG Yang, JIANG Yi. Preparation and mechanical property of C_f/C-ZrB₂ composite material by slurry brushing and needle punching. Materials Science and Engineering of Powder Metallurgy, 2021, 26(3): 278-284.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2021/V26/I3/278

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