ZrC纳米粉体改性C/C-SiC复合材料的微观结构和烧蚀性能

doi:10.19976/j.cnki.43-1448/TF.2024027

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摘要为改善C/C-SiC复合材料的抗烧蚀性能,以ZrC纳米粉体和Si粉为反应渗料,采用反应熔渗(reactive melt infiltration, RMI)法制备ZrC纳米粉体改性C/C-SiC复合材料。采用X射线衍射仪、扫描电镜和能谱仪等研究ZrC纳米粉体含量对C/C-SiC复合材料微观结构和烧蚀性能的影响。结果表明：随ZrC纳米粉体含量增加,复合材料的孔隙率增大,而密度变化不大。ZrC纳米粉体一部分弥散分布在SiC基体中,一部分则发生了团聚。烧蚀30 s后,ZrC纳米粉体摩尔分数为6%时,复合材料的质量烧蚀率和线烧蚀率最低,分别为2.0 mg/s和3.9 μm/s。随ZrC纳米粉体含量增加,烧蚀过程中形成的ZrO₂含量增多,对SiO₂的钉扎作用明显增强,能有效提升C/C-SiC复合材料的抗烧蚀性能。

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	汤磊
	白凯伦
	熊翔
	尹健
	张红波
	左劲旅

关键词 ： C/C-SiC复合材料, ZrC纳米粉体, 反应熔渗, 微观结构, 烧蚀性能

Abstract：In order to improve the ablation resistance of C/C-SiC composites, ZrC nano-powder modified C/C-SiC composites were prepared by the reactive melt infiltration (RMI) with ZrC nano-powder and Si powder as raw materials. X-ray diffraction, scanning electron microscopy, and energy dispersive spectrometer were used to investigate the effects of ZrC nano-powder contents on the microstructure and ablation properties of C/C-SiC composites. The results indicate that with the increase of ZrC nano-powder content, the porosity of the composite increases, but the density changes little. Meanwhile, part of ZrC nano-powders are diffusely distributed in the SiC matrix, and part of them are agglomerated. After ablation for 30 s, when the mole fraction of ZrC nano-powder is 6%, the composite exhibits the lowest mass and linear ablation rates of 2.0 mg/s and 3.9 μm/s, respectively. And with the increase of ZrC nano-powder content, the content of ZrO₂ formed during ablation increases, this leads to a notable enhancement in the pinning effect on SiO₂, effectively improving the ablation resistance of C/C-SiC composites.

Key words： C/C-SiC composite ZrC nano-powder reactive melt infiltration microstructure ablation property

收稿日期: 2024-03-25 出版日期: 2024-08-12

ZTFLH:

TB332

基金资助:国家自然科学基金资助项目(U19A2099)

通讯作者: 尹健,博士,教授。电话：13974827640;E-mail: jianyin@csu.edu.cn

引用本文:

汤磊, 白凯伦, 熊翔, 尹健, 张红波, 左劲旅. ZrC纳米粉体改性C/C-SiC复合材料的微观结构和烧蚀性能[J]. 粉末冶金材料科学与工程, 2024, 29(3): 191-200.
TANG Lei, BAI Kailun, XIONG Xiang, YIN Jian, ZHANG Hongbo, ZUO Jinlü. Microstructure and ablation properties of ZrC nano-powder modified C/C-SiC composites. Materials Science and Engineering of Powder Metallurgy, 2024, 29(3): 191-200.

链接本文:

http://pmbjb.csu.edu.cn/CN/10.19976/j.cnki.43-1448/TF.2024027 或 http://pmbjb.csu.edu.cn/CN/Y2024/V29/I3/191

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