Erosion–corrosion resistance of a β-Ta2O5 nanocrystalline coating in two-phase fluid impingement environments

Document Type

Journal Article

Publication Title

Materials Science and Technology

Publisher

Taylor & Francis Group

School

School of Engineering

RAS ID

31194

Funders

Funding information available at: https://doi.org/10.1080/02670836.2019.1597483

Grant Number

ARC

Comments

Xu, J., Peng, S., Jiang, S., Munroe, P., & Xie, Z. H. (2019). Erosion–corrosion resistance of a β-Ta2O5 nanocrystalline coating in two-phase fluid impingement environments. Materials Science and Technology, 35(8), 925-938. Available here

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-Ta2O5 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.

DOI

10.1080/02670836.2019.1597483

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