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Carbothermal synthesis of boron nitride coating on PAN carbon fiber

micmouse 添加于 2010-6-3 15:08 | 1442 次阅读 | 0 个评论

作者
Das M, Basu AK, Ghatak S, Joshi AG
摘要
Boron nitride (BN) thin coating has been formed on the surface of chemically activated polyacrylonitrile (PAN) carbon fiber by dip coating method. Dip coatingwas carried out in saturated boric acid solution followed by nitridation at a temperature of 1200 ◦C in nitrogen at atmospheric pressure to produce BN coating. Chemical activation improved surface area of PAN fiber which favours in situ carbothermal reduction of boric acid. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) have shown the formation of boron nitride. The X-ray photoelectron spectroscopy reveals that the coating forms a composite layer of carbon, BN/BOxNy and some graphite like BCN with local structure of B–N–C and B(N–C)3. The oxidation resistance of the coated fiber was significantly higher than uncoated carbon fiber. Tensile strength measurement reveals that the BN coated fiber maintained 90% of its original strength. As compared to chemical vapor deposition (CVD), this process is simple, non-hazardous and is expected to be cost effective.
详细资料
- 文献种类: Journal Article
- 期刊名称: Journal of the European Ceramic Society
- 期刊缩写: Journal of the European Ceramic Society
- 期卷页: 2009年第29卷第10期 2129-2134页
- ISBN: 0955-2219
学科领域工程技术 » 材料科学
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附件
Carbothermal synthesis of boron nitride coating on PAN carbon fiber