Carbothermal synthesis of boron nitride coating on PAN carbon fiber |
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| Authors: | M Das AK Basu S Ghatak Amish G Joshi |
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| Affiliation: | 1. Central Glass & Ceramic Research Institute, Kolkata 700032, India;2. National Physical Laboratory, New Delhi 110012, India;1. Department of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, People’s Republic of China;2. School of Mechanical & Electrical Engineering, Wuhan Institute of Technology, 693 Xiongchu Avenue, Wuhan 430073, People’s Republic of China;3. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China;4. School of Mechanical Engineering, University of Adelaide, SA 5005, Australia;5. School of Engineering, Edith Cowan University, Joondalup WA6027, Australia;6. School of Materials Science and Engineering, University of New South Wales, NSW 2052, Australia;1. IEM (Institut Europeen des Membranes) UMR 5635 (CNRS-ENSCM-UM2), Universite Montpellier 2, Place E. Bataillon, F-34095 Montpellier, France;2. SPCTS (UMR CNRS 7315), Centre Européen de la Céramique, 12 rue Atlantis, 87068 Limoges, France;3. EMPA – Swiss Federal Laboratories for Materials Testing and Research, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, Thun CH-3602, Switzerland;4. REOROM Laboratory, Hydraulics Department, “Politehnica” University of Bucharest, Splaiul Independentei 313, 060042 Bucharest, Romania;1. PROMES-CNRS Laboratory, 7 rue du four solaire, 66120 Font-Romeu Odeillo, France;2. von Karman Institute for Fluid Dynamics, 72 Chaussée de Waterloo, 1640 Rhode St Genèse, Belgium;3. Research Group Electrochemical and Surface Engineering, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Elsene/Brussel, Belgium;4. University of Tuebingen, Department of Geosciences, Applied Mineralogy, Wilhelmstrasse 56, 72074 Tuebingen, Germany;1. Division of Mechanical Design Engineering, Chonbuk National University Jeonju, Jeonbuk 561-765, Republic of Korea;2. Green Energy System Technology Center, Korea Institute of Industrial Technology, Cheonan-si, Chungnam-do 331-822, Republic of Korea |
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| 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. |
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