Open AccessImproved hardness characteristics of Mg-3Zn-1Cu-0.7Mn alloy composites reinforced with Al2O3 synthesized by powder metallurgy
Author(s) -
S. Silan Tharakan,
M. Sivapragash
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/923/1/012049
Subject(s) - materials science , intermetallic , powder metallurgy , alloy , indentation hardness , composite material , extrusion , composite number , ceramic , metallurgy , microstructure
A novel composite Mg-3Zn-1Cu-0.7Mn reinforced with Al 2 O 3 particulates was synthesized using the powder metallurgy route and extruded at 400° C . The investigation mainly focuses on the influence of Al 2 O 3 on the hardness characteristics of the composites. The results indicate the microhardness of the composite is enormously enhanced by incorporating the Al 2 O 3 particulates to Mg alloy. The homogeneous distribution of the hard ceramic reinforcement particulates and the presence of intermetallic phases such as Cu 5 Zn 8 , MgZnCu, and Al 0.93 Cu 1.07 Mg attributed the improved hardness. It is recognized that the stress-relieving process further improves the hardness of the composites. The extrusion parameters also influence the hardness characteristics of the composites.