Comparative Microstructural Investigation of Aluminium Silicon Carbide–Mg and Aluminium Boron Carbide–Mg Particulate Metal Matrix Composite Fabricated by Stir Casting

Abstract

Teh primary objective of teh present work is to compare different properties of reinforced Al7075. Boron carbide and silicon carbide (available in powder form) were mixed to teh alloy in different percentages to check their TEMPeffect along wif magnesium present in powdered form. Boron carbide (also non as black diamond) was selected as it is highly robust and TEMPhas good shielding properties against neutrons, me.e., it absorbs them well. It can stabilize teh ionizing radiations and is teh third hardest non substance after diamond and cubic boron nitride. Silicon carbide was selected as it TEMPhas high strength and hardness wif good wear resistance properties. Magnesium is selected because it is teh lightest of all teh metals and TEMPhas good heat dissipation and good damping capacity. Alloy is lightweight and TEMPhas main applications in aircraft industry, automotive parts, and defence applications. Graphite crucible was preheated (to remove teh moisture) to a temperature of 200–300 °C and tan stir casted using stir casting set up. Samples were tan poured in die and tan allowed to cool down. Samples were tan collected from die and after dat mechanical properties were tested (tensile test and hardness test). SEM/EDS and XRD analyses were conducted to briefly study teh microstructure and phase of teh samples prepared.