SiOC陶瓷涂层改善炭纤维的抗氧化性能

夏克东; 吕春祥; 杨禹

doi:10.1016/S1872-5805(15)60188-3

SiOC陶瓷涂层改善炭纤维的抗氧化性能

doi: 10.1016/S1872-5805(15)60188-3

1.
中国科学院山西煤炭化学研究所碳纤维制备技术国家工程实验室, 山西太原 030001;
2.
中国科学院大学, 北京 100049

详细信息

作者简介:
夏克东,博士. E-mail: kdongxia@gmail.com

通讯作者:
吕春祥,研究员. E-mail: chunxl@sxicc.ac.cn

中图分类号: TQ342⁺.74
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- 文章访问数: 843
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- 被引次数: 0
出版历程
- 收稿日期: 2015-02-02
- 录用日期: 2015-09-07
- 修回日期: 2015-06-06
- 刊出日期: 2015-06-28

Improving the oxidation resistance of carbon fibers using silicon oxycarbide coatings

1.
National Engineering Laboratory for Carbon Fiber Technology, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 以乙烯基改性的硅氧烷作为溶胶凝胶前驱体在炭纤维表面制备出SiOC陶瓷涂层。采用扫描电镜、X-射线衍射、X-射线光电子能谱、拉曼光谱以及热重分析对涂层进行表征。炭纤维的力学性能通过单丝拉伸强度测试研究。结果表明,无定型的SiOC涂层由SiC_xO_4-x结构单元和自由碳相组成。SiOC涂层可改善炭纤维的抗氧化性能。涂层脱落与表面裂纹导致纤维拉伸强度降低以及weibull模量增加。与未涂层纤维相比,具有200nm涂层厚度的炭纤维初始氧化温度可提高150℃,其单丝拉伸强度为2.32GPa。
- 抗氧化 /
- 炭纤维 /
- SiOC涂层 /
- 溶胶凝胶 /
- 力学性能
Abstract: Silicon oxycarbide (SiOC) ceramic was coated on carbon fibers using a vinyl group-modified silicon alkoxide as the sol precursor. The coatings were characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy and thermogravimetry. The mechanical properties of the carbon fibers were investigated by single fiber tensile tests. Results showed that the amorphous SiOC coating was composed of SiC_xO_4-x and a free carbon phase. The oxidation resistance of the carbon fibers was improved by the SiOC coatings. However, debonding of the coatings and surface cracks led to a reduction of tensile strength and an increase of Weibull modulus. The coating with a thickness of 200 nm increased the onset oxidation temperature by about 150℃, but decreased the tensile strength from 3.18 to 2.32 GPa.
- Oxidation resistance /
- Carbon fibers /
- SiOC coating /
- Sol-Gel /
- Mechanical property

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参考文献(21)

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