Ultrasonic assisted reactive synthesis and characterization of Al–MgAl 2 O 4 in-situ composite

The current study investigates the impact of Ultrasonic Treatment (UT) upon the microstructure and mechanical characteristics of Al–MgAl 2 O 4 in-situ composite prepared using SiO 2 oxide source and Al-2wt.% Mg alloy. According to the findings, because of UT in composite melt SiO 2 reaction has been enhanced (86%) resulting MgAl 2 O 4 particles of size ranging from 0.2 to 5 μm. The released Si after the silica reaction with Al–Mg has made in-situ alloying with matrix resulting Mg 2 Si phase formation along with α-Al. In UT composite 67% decrease in overall grain size was observed in the matrix material in comparison with Al–MgAl 2 O 4 non-UT composite. The reinforcement of MgAl 2 O 4 particles, combined with grain size refinement, has substantially enhanced the mechanical properties of the UT composite specifically hardness and tensile yield strength by 40 and 47%, respectively.