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

Elias Ananiadis, Konstantinos Argyris, Theodore Matikas, Athanasios Sfikas, Alexandros Karantzalis

Research output: Contribution to journalArticlepeer-review

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.
Original languageEnglish
Article number1300
Number of pages12
JournalApplied Sciences (Switzerland)
Volume11
Issue number3
DOIs
Publication statusPublished - 1 Feb 2021
Externally publishedYes

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