Tribological characterization of stir-cast hybrid magnesium composite reinforced with Zirconium,Garnet and graphite particulates

• Main Authors: Syeda, Romana, Laxminarayana, P., Nagaveni, T., Ahmed, Naseeruddin
• Format: Conference Proceeding
• Language: English
• Subjects: Automobiles; Automotive fuels; Composite materials; Friction; Garnets; Graphite; Load; Magnesium; Particulate composites; Particulates; Reinforcement; Sliding; Tribology; Wear rate; Zirconium
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0114650

Magnesium-Zr-Graphite-Garnet based composites are the recent advancements to minimize the con-sumption of fuel and the cost of automobiles by the automobile firms. Research in lightweight cast materials for structural components has been increasing. In the present work, Magnesium based metal matrix along with Zr (1%) - Graphite (0.3-0.9%) - Garnet (0.9%) reinforced composite materials are manufactured by the process of stir casting. The tribological and microstructural characteristics are studied. The co-efficient of friction and wear rate are evaluated on Pin-on-disc testing machine with the varying factors i.e., applied load (10N-30N), percentage of composite reinforcement graphite (0.3%, 0.6%, 0.9%), sliding velocity (0.5m/s, 1.5m/s, 2.5m/s) and sliding distance (500m,1500m, 2500m) with the constant compositions of 0.9 garnet and 1 zirconium. The dominant factor for wear rate is applied load and for co-efficient of friction is percentage of composite reinforcement. It was observed that the wear rate is low at 0.6 of composite reinforcement, 10N applied load, 0.5 m/s sliding-velocity and 500m sliding-distance. The smaller values of co-efficient of friction was obtained at 0.3% of composite reinforcement, 10N applied load, 1.5m/s sliding-velocity and 2500m of sliding-distance. The worn surface of the composite with higher applied loads and higher percentage of composite reinforcement varying parameters shows the better results.