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Nano-crystalline ultra high temperature HfB2 and HfC powders and coatings using a sol-gel approach
journal contribution
posted on 2011-10-19, 13:01 authored by Saranya Venugopal, Anish Paul, Bala Vaidhyanathan, J.G.P. Binner, A. Heaton, Peter M. BrownNano-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.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
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. 151-160Publisher
Wiley © American Ceramic SocietyVersion
- AM (Accepted Manuscript)
Publication date
2011Notes
This article is closed access.ISBN
9781118059883Book series
Ceramic Engineering and Science Proceedings;Vol 32 Pt 3Language
- en