Microstructure analysis of AA6082/Si3N4 and AA6082/SiC composites

Abstract

PurposeParts that are to be used in aircraft, satellites, automobiles and ships should have sound microstructure. Components made from AA6082/Si3N4 and AA6082/SiC composites are in demand from industries. Hence, these components are to be fabricated by suitable technique at the appropriate value of process parameters. The purpose of this paper is Microstructure analysis of AA6082/Si3N4 and AA6082/SiC compositesDesign/methodology/approachAA6082/Si3N4 and AA6082/SiC composites are successfully fabricated using the stir casting process. Their microstructures have been analyzed. This has been done at different magnification. The effect of the addition of Si3N4 and SiC particles in the 6082 aluminum alloy is investigated. Microstructure of AA6082/Si3N4 and AA6082/SiC composites are also compared. Results show that Si3N4 and SiC particles have good wettability with AA6082. These reinforcement particles are homogeneously distributed in the matrix of AA6082.FindingsThere are no adverse effects of reactions in the microstructure of AA6082/Si3N4 and AA6082/SiC composites. There is not much difference between the distribution and interfacial characteristics of Si3N4 and SiC particles. AA6082/Si3N4 and AA6082/SiC composites have good properties. This is high strength at low density. Due to which they become suitable for the aircraft and space industry. So far, SiC, Al2O3 and tungsten carbide have been mostly used as reinforcements with different grades of aluminum alloy.Originality/valueNot much experimental work is found with Si3N4 and SiC particles as reinforcement with AA6082. The novelty of this research work is that an effort has been made to fabricate AA6082/Si3N4 and AA6082/SiC composites at such values of process parameters, by stir casting process, so that sound and defect free microstructure is obtained. Microstructure of AA6082/Si3N4 and AA6082/SiC composites is also compared, to find which is better.