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Open AccessArticle

Performance of Hybrid Powder-Suspension Axial Plasma Sprayed Al2O3—YSZ Coatings in Bovine Serum Solution

1
Department of Physics, School of Advanced Sciences, VIT, Vellore 632014, India
2
Centre for Biomaterials, Cellular and Molecular Theranostics, VIT, Vellore 632014, India
3
Department of Engineering sciences, University West, 46186 Trollhättan, Sweden
*
Author to whom correspondence should be addressed.
Materials 2019, 12(12), 1922; https://doi.org/10.3390/ma12121922
Received: 24 April 2019 / Revised: 4 June 2019 / Accepted: 10 June 2019 / Published: 14 June 2019
(This article belongs to the Special Issue Advances in Thermal Spray Technology)
Ceramic coatings on metallic implants are a promising alternative to conventional implants due to their ability to offer superior wear resistance. The present work investigates the sliding wear behavior under bovine serum solution and indentation crack growth resistance of four coatings, namely (1) conventional powder-derived alumina coating (Ap), (2) suspension-derived alumina coating (As), (3) composite Al2O3—20wt % Yittria stabilized Zirconia (YSZ) coating (AsYs) deposited using a mixed suspension, and (4) powder Al2O3—suspension YSZ hybrid composite coating ApYs developed by axial feeding plasma spraying, respectively. The indentation crack growth resistance of the hybrid coating was superior due to the inclusion of distributed fine YSZ particles along with coarser alumina splats. Enhanced wear resistance was observed for the powder derived Ap and the hybrid ApYs coatings, whereas the suspension sprayed As and AsYs coatings significantly deteriorated due to extensive pitting. View Full-Text
Keywords: axial feeding; hybrid plasma spray coating; bovine serum solution; sliding wear; indentation axial feeding; hybrid plasma spray coating; bovine serum solution; sliding wear; indentation
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MDPI and ACS Style

Gopal, V.; Goel, S.; Manivasagam, G.; Joshi, S. Performance of Hybrid Powder-Suspension Axial Plasma Sprayed Al2O3—YSZ Coatings in Bovine Serum Solution. Materials 2019, 12, 1922.

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