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Microstructure and wear behaviour of powder and suspension hybrid Al2O3–YSZ coatings

Murray, James W.; Leva, Alessandro; Joshi, Shrikant; Hussain, Tanvir

Authors

Alessandro Leva

Shrikant Joshi



Abstract

Suspension based plasma sprayed coatings can yield superior microstructural and tribological properties compared to conventional powder based plasma sprayed coatings. This study investigates a new hybrid method, using simultaneous spraying from powder and suspension, to produce composite coatings using alumina and yttria stabilised zirconia (YSZ), with potentially excellent wear and thermal properties. Dry sliding wear showed the alumina suspension-YSZ suspension coating yielded half the specific wear rate of the alumina powder-YSZ suspension, explained by preferential gamma alumina formation and increased porosity in the latter. Both YSZ-containing samples showed superior toughness and wear rate than simple alumina powder and suspension coatings.

Citation

Murray, J. W., Leva, A., Joshi, S., & Hussain, T. (in press). Microstructure and wear behaviour of powder and suspension hybrid Al2O3–YSZ coatings. Ceramics International, https://doi.org/10.1016/j.ceramint.2018.02.048

Journal Article Type Article
Acceptance Date Feb 5, 2018
Online Publication Date Feb 6, 2018
Deposit Date Feb 9, 2018
Publicly Available Date Feb 7, 2019
Journal Ceramics International
Print ISSN 0272-8842
Electronic ISSN 1873-3956
Publisher Elsevier
Peer Reviewed Peer Reviewed
DOI https://doi.org/10.1016/j.ceramint.2018.02.048
Keywords A suspensions; B composites; C wear resistance; D Al2O3
Public URL http://eprints.nottingham.ac.uk/id/eprint/49688
Publisher URL https://www.sciencedirect.com/science/article/pii/S0272884218303444
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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