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粉末冶金材料科学与工程 >

2024 , Vol. 29 >Issue 3: 191 - 200

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

工艺技术

ZrC纳米粉体改性C/C-SiC复合材料的微观结构和烧蚀性能

  • 汤磊 ,
  • 白凯伦 ,
  • 熊翔 ,
  • 尹健 ,
  • 张红波 ,
  • 左劲旅
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  • 1.中南大学 粉末冶金国家重点实验室,长沙 410083;
    2.湖南博云新材料股份有限公司,长沙 410205

收稿日期: 2024-03-25

  修回日期: 2024-06-05

  网络出版日期: 2024-08-12

基金资助

国家自然科学基金资助项目(U19A2099)

收起

Microstructure and ablation properties of ZrC nano-powder modified C/C-SiC composites

  • TANG Lei ,
  • BAI Kailun ,
  • XIONG Xiang ,
  • YIN Jian ,
  • ZHANG Hongbo ,
  • ZUO Jinlü
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  • 1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
    2. Hunan Boyun New Materials Co., Ltd., Changsha 410205, China

Received date: 2024-03-25

  Revised date: 2024-06-05

  Online published: 2024-08-12

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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。

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

本文引用格式

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

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

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