Processing of Mg-3.2 Al-2.4 Zn Alloy Matrix In-situ Composites by Reactive Infiltration Technique
Mohammad Tusar Ali,
Kazi Mohammad Shorowordi
Issue:
Volume 2, Issue 2, June 2018
Pages:
21-27
Received:
12 June 2018
Accepted:
11 July 2018
Published:
7 August 2018
Abstract: Mg alloy matrix composites having a combination of their indispensable and superior properties have drawn an attention for various implementations especially in automotive and aerospace industries. Mg in-situ composites were synthesized using Mg-3.2Al-2.4Zn alloy ingot, coarse Ti and B4C powder. Ti and B4C powders were mixed in a plastic bottle with zirconia balls in Ar atmosphere by ball milling. The resulting mixture of these powders was compacted into a cylindrical preform which was infiltrated by Mg-3.2Al-2.4Zn alloy under capillary force. The infiltration of the preform was performed in an electric resistance furnace at the temperatures of 800°C and 900°C for different holding time in Ar atmosphere. The microstructure of the in-situ composites was investigated with a field emission scanning electron microscope (FESEM) equipped with Energy Dispersive X-ray (EDX). The formation of phases in the in-situ composites during processing was identified using XRD with Cu Kα radiation. SEM revealed different phases in the in-situ composites. It was found in XRD pattern that TiC TiB2, TiB, MgB2, MgB4, B13C2 and Ti2AlC compounds were formed during infiltration of Mg-3.2 Al-2.4 Zn alloy matrix in the composites. The effect of processing parameters on bulk density and Brinell hardness was also discussed.
Abstract: Mg alloy matrix composites having a combination of their indispensable and superior properties have drawn an attention for various implementations especially in automotive and aerospace industries. Mg in-situ composites were synthesized using Mg-3.2Al-2.4Zn alloy ingot, coarse Ti and B4C powder. Ti and B4C powders were mixed in a plastic bottle wit...
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