TY - JOUR
T1 - Microstructure and Corrosion Performance of Aluminium Matrix Composites Reinforced with Refractory High-Entropy Alloy Particulates
AU - Ananiadis, Elias
AU - Argyris, Konstantinos
AU - Matikas, Theodore
AU - Sfikas, Athanasios
AU - Karantzalis, Alexandros
PY - 2021/2/1
Y1 - 2021/2/1
N2 - 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.
AB - 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.
KW - aluminium matrix composites
KW - particulate reinforcement
KW - high-entropy alloys
KW - MoTaNbVW
KW - corrosion
KW - potentiodynamic polarisation
U2 - 10.3390/app11031300
DO - 10.3390/app11031300
M3 - Article
VL - 11
JO - Applied Sciences (Switzerland)
JF - Applied Sciences (Switzerland)
SN - 2523-3963
IS - 3
M1 - 1300
ER -