The Problem Addressed
Metal matrix composites, especially aluminum reinforced with ceramic particles like alumina (Al2O3), are highly sought after in various industries for their strength and light weight. A key challenge in their manufacturing via the stir casting method is achieving a uniform distribution of the reinforcement particles. Uneven distribution leads to inconsistent mechanical properties, reducing the material’s reliability. This research aims to investigate the influence of two key parameters: agitation depth and reinforcement particle treatment.
What Was Done and Found
This research created an Al-MMC composite reinforced with 6 wt% Al2O3 particles using the stir casting method. Two main variables were tested: first, the stirrer’s agitation depth was varied at 30% and 70% of the molten metal’s depth; second, the reinforcement particles were subjected to heat treatment and electrolysis to improve their bonding with the molten aluminum. The results showed that a 70% agitation depth produced a more uniform particle distribution. The electrolysis treatment on the particles significantly improved matrix bonding, most clearly seen at 30% depth, which resulted in the highest hardness (96.5 HRB) and a lower wear rate. The composite with heat-treated particles also showed superior properties, with hardness increasing to 70.2 HRB and a correspondingly lower wear rate.
Impact and Significance
This research provides a valuable, practical guide for the manufacturing industry. It shows that aluminum matrix composites can be produced with better and more uniform properties by optimizing the agitation depth and applying surface modification techniques to the reinforcement particles. With the right process parameters, manufacturers can create composites that are stronger, more wear-resistant, and more reliable for advanced, high-performance applications.
Citation and Link to Original Source
For technical details and complete data, please read our official publication:
Imanullah, F., Akbar, H. I., Surojo, E., Ariawan, D., & Pramudi, G. (2025). Agitation Depth and Reinforcement Treatment on Tribology Characteristics of Aluminium particulated Composite under the Stir Casting Method. Engineering, Technology & Applied Science Research, 15(3), 22411-22417. https://doi.org/10.48084/etasr.10171
