Carbothermal synthesis of boron nitride coating on PAN carbon fiber

被引：82

作者：

Das, M. ^{[1
]}

Basu, A. K. ^{[1
]}

Ghatak, S. ^{[1
]}

Joshi, Amish G. ^{[2
]}

机构：

[1] Cent Glass & Ceram Res Inst, Nonoxide Ceram & Composite Div, Kolkata 700032, India

[2] Natl Phys Lab, New Delhi 110012, India

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2009年 / 29卷 / 10期

关键词：

Carbon; Fiber; Boron nitride; Coating; Strength; RAY PHOTOELECTRON-SPECTROSCOPY; CERAMIC-MATRIX COMPOSITES; THIN-FILMS; SILICON-CARBIDE; BN; OXIDATION; BEHAVIOR; CVD;

D O I：

10.1016/j.jeurceramsoc.2008.12.004

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

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 coating was carried out in saturated boric acid solution followed by nitridation at a temperature of 1200 degrees 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 fort-nation 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. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2129 / 2134

页数：6

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