Microstructure and Corrosion Performance of Aluminium Matrix Composites Reinforced with Refractory High-Entropy Alloy Particulates

Ananiadis, Elias, Argyris, Konstantinos T., Matikas, Theodore E., Sfikas, Athanasios and Karantzalis, Alexandros E. (2021) Microstructure and Corrosion Performance of Aluminium Matrix Composites Reinforced with Refractory High-Entropy Alloy Particulates. Applied Sciences, 11 (3). p. 1300. ISSN 2076-3417

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Official URL: https://doi.org/10.3390/app11031300

Abstract

Novel aluminium matrix composites reinforced by MoTaNbVW refractory high-entropy alloy (HEA) particulates have been fabricated by powder metallurgy. The microstructure of the produced composites has been studied and the corrosion behaviour assessed in 3.5% NaCl solution. The composites exhibited low porosity, good homogeneity, few defects, and good distribution of the reinforcing phase in the Al matrix. No secondary intermetallic phases have been formed while the interface between matrix/reinforcement showed good bonding with no signs of reactivity. Increasing the volume of the reinforcing phase leads to increased hardness values. Al-HEA composites exhibited susceptibility to localised forms of corrosion in 3.5% NaCl solution. The microstructure has been analysed and corrosion mechanisms have been formulated.

Item Type: Article
Uncontrolled Keywords: aluminium matrix composites; particulate reinforcement; high-entropy alloys; MoTaNbVW; corrosion; potentiodynamic polarisation
Subjects: H100 General Engineering
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Rachel Branson
Date Deposited: 02 Mar 2021 15:39
Last Modified: 02 Mar 2021 15:45
URI: http://nrl.northumbria.ac.uk/id/eprint/45590

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