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Nano-crystalline ultra high temperature HfB2 and HfC powders and coatings using a sol-gel approach

journal contribution
posted on 19.10.2011, 13:01 by Saranya Venugopal, Anish Paul, Bala Vaidhyanathan, J.G.P. Binner, A. Heaton, Peter M. Brown
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.

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. 151-160

Publisher

Wiley © American Ceramic Society

Version

AM (Accepted Manuscript)

Publication date

2011

Notes

This article is closed access.

ISBN

9781118059883

Book series

Ceramic Engineering and Science Proceedings;Vol 32 Pt 3

Language

en

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