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Screw dislocation assisted spontaneous growth of HfB2 tubes and rods
journal contribution
posted on 2015-11-09, 10:51 authored by Saranya Venugopal, Daniel Doni Jayaseelan, Anish Paul, Vaidhy VaidhyanathanVaidhy Vaidhyanathan, J.G.P. Binner, Peter M. BrownThe mechanism of anisotropic growth of HfB2 rods has been discussed in this study. HfB2 powder has been synthesized via a sol–gel-based route using phenolic resin, hafnium chloride, and boric acid as the source of carbon, hafnium, and boron
respectively, though a small number of comparative experiments involved amorphous boron as the boron source. The effects of calcination dwell time and Hf:C and Hf:B molar ratio on the purity and morphology of the final powder have been studied and the mechanism of anisotropic growth of HfB2
has been investigated. It is hypothesized that imperfect oriented attachment of finer HfB2 particles results in screw dislocations
in the coarser particles. The screw dislocation facilitates dislocation-driven growth of particles into anisotropic
HfB2 rods.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
Published in
JOURNAL OF THE AMERICAN CERAMIC SOCIETYVolume
98Issue
7Pages
2060 - 2064 (5)Citation
VENUGOPAL, S. ...et al., 2015. Screw Dislocation Assisted Spontaneous Growth of HfB2 Tubes and Rods. Journal of the American Ceramic Society, 98(7), pp. 2060-2064.Publisher
© The American Ceramic Society. Published by Wiley.Version
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2015Notes
This paper is in closed access.ISSN
0002-7820Publisher version
Language
- en