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Suspension high velocity oxy-fuel spraying of TiO2: a quantitative approach to phase composition

Pala, Z.; Shaw, E.; Murray, J.W.; Senin, Nicola; Hussain, Tanvir

Authors

Z. Pala

E. Shaw

Nicola Senin



Abstract

A range of coatings from a water based suspension of anatase has been prepared by suspension high velocity oxy-fuel spraying with the aim to study effects of heat power of the flame on phase composition, microstructure and surface topography. Three most commonly used approaches of quantitative phase analysis have been scrutinized with respect to their applicability and as some of the coatings showed presence of preferred orientation and it was argued that quantitative Rietveld refinement is the most accurate method for phase composition determination. Coatings had a layered duplex anatase/rutile microstructure with fraction of rutile increasing exponentially with heat power. Spraying at the lower heat power led to a lower surface roughness and higher power resulted in surfaces with pronounced humps, which were distributed homogeneously on the surface. The emergence of humps is related to an increase in macroscopic surface area of up to 30% with respect to the flat coating.

Citation

Pala, Z., Shaw, E., Murray, J., Senin, N., & Hussain, T. (2017). Suspension high velocity oxy-fuel spraying of TiO2: a quantitative approach to phase composition. Journal of the European Ceramic Society, 37(2), https://doi.org/10.1016/j.jeurceramsoc.2016.08.030

Journal Article Type Article
Acceptance Date Aug 25, 2016
Online Publication Date Aug 29, 2016
Publication Date Feb 1, 2017
Deposit Date Nov 23, 2016
Publicly Available Date Nov 23, 2016
Journal Journal of the European Ceramic Society
Print ISSN 0955-2219
Electronic ISSN 1873-619X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 37
Issue 2
DOI https://doi.org/10.1016/j.jeurceramsoc.2016.08.030
Keywords Suspension HVOF spraying; Rietveld refinement; Topography; Anatase; Rutile
Public URL http://eprints.nottingham.ac.uk/id/eprint/38916
Publisher URL http://www.sciencedirect.com/science/article/pii/S0955221916304642
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0





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