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Title: Nano-crystalline ultra high temperature HfB2 and HfC powders and coatings using a sol-gel approach
Authors: Venugopal, Saranya
Paul, Anish
Vaidhyanathan, Bala
Binner, J.G.P.
Heaton, A.
Brown, Peter M.
Issue Date: 2011
Publisher: Wiley © American Ceramic Society
Citation: VENUGOPAL, S. ... et al, 2011. Nano-crystalline ultra high temperature HfB2 and HfC powders and coatings using a sol-gel approach. IN: Widjaja, S. and Singh, D. (volume eds). Advanced Ceramic Coatings and Materials for Extreme Environments. Wiley, pp. 151-160
Series/Report no.: Ceramic Engineering and Science Proceedings;Vol 32 Pt 3
Abstract: Nano-crystalline HfB2 and HfC powders have been synthesized through a simple sol-gel route by using inorganic precursors like hafnium (IV) chloride (HfCl4), boric acid (H3BO3) and phenolic resin as a source of hafnium, boron and carbon respectively. The resulting HfB2 powders had an average crystallite size of ~35 nm whilst the HfC powders were ~75 nm in diameter. The precursor gels of HfC and HfB2 were also used to dip coat SiC fibre bundles, on heat treatment, a continuous coating of HfC and HfB2 was obtained. The wettability of the gels was determined using contact angle measurements. The continuity of the coatings on the SiC fibre bundles were characterized using optical and scanning electron microscopy.
Description: This article is closed access.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/8955
ISBN: 9781118059883
Appears in Collections:Closed Access (Materials)

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