Carbothermal synthesis of boron nitride coating on PAN carbon fiber

M. Das; A. K. Basu; S. Ghatak; Amish G. Joshi

doi:10.1016/j.jeurceramsoc.2008.12.004

Carbothermal synthesis of boron nitride coating on PAN carbon fiber

M. Das^*, A. K. Basu, S. Ghatak, Amish G. Joshi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

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 °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/BO_xN_y 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.

Original language	English
Pages (from-to)	2129-2134
Number of pages	6
Journal	Journal of the European Ceramic Society
Volume	29
Issue number	10
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2008.12.004
State	Published - Jul 2009
Externally published	Yes

Keywords

Boron nitride
Carbon
Coating
Fiber
Strength

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10.1016/j.jeurceramsoc.2008.12.004

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title = "Carbothermal synthesis of boron nitride coating on PAN carbon fiber",

abstract = "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 °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.",

keywords = "Boron nitride, Carbon, Coating, Fiber, Strength",

author = "M. Das and Basu, {A. K.} and S. Ghatak and Joshi, {Amish G.}",

note = "Funding Information: The work described in this paper is supported by the ASL, DRDO Govt. of India. The authors wish to thank the staff-members of Non-Oxide Ceramic and Composite Division, CGCRI for their cooperation and help.",

year = "2009",

month = jul,

doi = "10.1016/j.jeurceramsoc.2008.12.004",

language = "אנגלית",

volume = "29",

pages = "2129--2134",

journal = "Journal of the European Ceramic Society",

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AU - Das, M.

AU - Basu, A. K.

AU - Ghatak, S.

AU - Joshi, Amish G.

N1 - Funding Information: The work described in this paper is supported by the ASL, DRDO Govt. of India. The authors wish to thank the staff-members of Non-Oxide Ceramic and Composite Division, CGCRI for their cooperation and help.

PY - 2009/7

Y1 - 2009/7

N2 - 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 °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.

AB - 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 °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.

KW - Boron nitride

KW - Carbon

KW - Coating

KW - Fiber

KW - Strength

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JF - Journal of the European Ceramic Society

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Carbothermal synthesis of boron nitride coating on PAN carbon fiber

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Keywords

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