The aim of this research study is the investigating the properties of a hybrid Magnesium (Mg) Metal Matrix Composite (MMC) fabricated using integrated squeeze cum stir casting setup. The challenges of this liquid metallurgy processing route are non-uniform distribution and agglomeration of reinforcement particles; this could cause poor quality in composites, which might result in ruining the value of the properties and performance of the fabricated composites. The primary and secondary reinforcements investigated on this study are Silicon Nitride (Si₃N₄) and Aluminium Oxide (Al₂O₃) respectively. Magnesium alloy (ZE41A- mainly based on zinc, zirconium and cerium) was taken as base metal with micron sized Silicon Nitride (Si₃N₄) as primary reinforcement. Aluminum Oxide(Al₂O₃) is employed as secondary reinforcement to fabricate hybrid magnesium MMC of different weight fractions; (a) Pure Mg (ZE41A), (b) 1 wt% of Si₃N₄ and 1wt% of Al₂O₃, (c) 2 wt% of Si₃N₄ and 2 wt% of Al₂O_3, (d) 3 wt% of Si₃N₄ and 3 wt% of Al₂O₃ and (e) 4 wt% of Si₃N₄ and 4 wt% of Al₂O₃. The fabricated composites are analyzed for metallurgical, mechanical characterization and tribological behavior by optical microscopic analysis, SEM imaging, and EDAX analyses. The maximum ultimate tensile strength observed is 201.5 MP, a 11.93% increase than pure Mg ZE41A base alloy

Keywords: Magnesium ZE41A alloy, Hybrid MMC, Stir-Squeeze casting, Particle reinforcements, Characterization, Si₃N₄& Al₂O₃ reinforcement