Mechanical behaviour of aluminium based metal matrix composite reinforced with SI3N4 and B4C

Abstract

This investigation on mechanical and tribological behavior aluminum 6063 boron carbide silicon nitride composite are identified. Aluminum 6063 particles reinforced composites were produced through stir casting route. In the samples of Al 6063 composites were tested for tensile, impact, optical microscope, Scanning Electron Microscope (SEM), EDAX. The test result showed increasing tensile strength, of composites compared with base alloy because of the presence of increased ceramic phase. The wear resistance of the composites increased with increasing content of boron carbide particles The micro structural results showed a grain refinement with the increased in silicon nitride content. The results exhibited with the increase in silicon nitride reinforcement the microhardness improved. The microhardness showed a decreasing trend with increase in identification load and decreasing trend with increasing dwell time. Different % age of reinforcement (13%) is used in the paper. SEM used to investigate the microstructure of the composite. The coefficient of friction decreased with increased boron carbide content and reached its minimum at 5% Boron carbide. The silicon nitride content and reached its minimum at 8%.