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Type: Journal article
Title: Erosion–corrosion resistance of a β-Ta₂O₅ nanocrystalline coating in two-phase fluid impingement environments
Other Titles: Erosion-corrosion resistance of a beta-Ta(2)O(5) nanocrystalline coating in two-phase fluid impingement environments
Author: Xu, J.
Peng, S.
Jiang, S.
Munroe, P.
Xie, Z.H.
Citation: Materials Science and Technology, 2019; 35(8):925-938
Publisher: Taylor & Francis
Issue Date: 2019
ISSN: 0267-0836
Statement of
Jiang Xu, Shuang Peng, Shuyun Jiang, Paul Munroe and Zong-Han Xie
Abstract: In this study, a β-Ta₂O₅ coating was deposited onto a Ti–6Al–4V substrate using a double-cathode glow discharge plasma technique. The hardness and elastic modulus values of the β-Ta₂O₅ coating were almost 4 times and 1.8 times greater than that of the Ti–6Al–4V substrate, respectively. Potentiodynamic polarisation curves indicated that the current densities of the β-Ta₂O₂ coated sample are least one order of magnitude less than that observed for the uncoated substrate under a solid/liquid slurry flow. Electrochemical impedance spectroscopy results showed that the resistance values for the β-Ta₂O₅ coating are of the order of 10⁶ Ω cm², and at the same erosion time, the resistance value for the β-Ta₂O₅ coating is one order of magnitude greater than that of the Ti–6Al–4V.
Keywords: Erosion–corrosion; polarisation; β-Ta₂O₅ nanocrystalline coating; EIS; synergy
Rights: © 2019 Institute of Materials, Minerals and Mining.
DOI: 10.1080/02670836.2019.1597483
Grant ID: ARC
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Mechanical Engineering publications

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