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工艺技术

基于聚硅氧烷的SiC(O)纤维的制备与表征

  • 沈艳 ,
  • 赵钟倩 ,
  • 杨天月 ,
  • 苟燕子
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  • 国防科技大学 空天科学学院, 长沙 410073

收稿日期: 2025-02-13

  修回日期: 2025-03-31

  网络出版日期: 2025-04-15

基金资助

国防科工局稳定支持科研项目(WDZC20215250507)

Preparation and characterization of polysiloxane-based SiC(O) fibers

  • SHEN Yan ,
  • ZHAO Zhongqian ,
  • YANG Tianyue ,
  • GOU Yanzi
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  • College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China

Received date: 2025-02-13

  Revised date: 2025-03-31

  Online published: 2025-04-15

摘要

SiC纤维常用的先驱体聚碳硅烷价格高昂,为降低成本,本文以聚硅氧烷为硅源、聚丙烯腈为碳源制备改性先驱体,采用先驱体转化陶瓷技术和静电纺丝工艺制备聚合物原纤维,通过紫外辐照和空气热交联进行不熔化处理,再在N2气氛中进行热解制备SiC(O)纤维,并对SiC(O)纤维的微观结构和抗氧化性能进行研究。结果表明:SiC(O)纤维直径为200~300 nm,均匀度好,表面无孔隙,其在600 ℃的抗氧化性能优于C纤维。

本文引用格式

沈艳 , 赵钟倩 , 杨天月 , 苟燕子 . 基于聚硅氧烷的SiC(O)纤维的制备与表征[J]. 粉末冶金材料科学与工程, 2025 , 30(2) : 139 -147 . DOI: 10.19976/j.cnki.43-1448/TF.2025012

Abstract

Polycarbosilane commonly used precursor for SiC fibers is prohibitively expensive. To mitigate production expenses, this study employs polysiloxane as the silicon source and polyacrylonitrile as the carbon source to prepare a modified precursor. Polymer precursor fibers were fabricated via precursor-derived ceramic technology combined with electrostatic spining. The fibers underwent stabilization through ultraviolet irradiation and air-stabilization followed by pyrolysis in a N2 atmosphere to produce SiC(O) fibers, then the microstructures and oxidation resistance of the SiC(O) fibers were investigated. The results show that the SiC(O) fibers exhibit a diameter of 200-300 nm, excellent uniformity, and pore-free surface. Moreover, their oxidation resistance at 600 ℃ surpasses that of carbon fibers.

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