Investigating the effect of porosity on aluminium 7075 alloy reinforced with silicon nitride (Si3N4) metal matrix composites through STIR casting process
Sandeep Kumar, J. Hari Vignesh, S. Paul Joshua
Abstract
Aluminium 7075 alloy was reinforced with silicon nitride (Si3N4) in the range of 4%, 8% and 12% were fabricated using stir casting route. Casted specimens are heat-treated at various conditions to eliminate the Porosity and X-ray computed tomography and image analyzer techniques were used to measure the Porosity in casting. Further, the casted specimens were tested for chemical composition using Spectro analysis; micro image and micro-hardness are conducted. Dispersion of Si3N4 in Al alloy was observed using a scanning electron microscope.
Topics & Concepts
Materials sciencePorosityAluminiumCastingComposite materialSilicon nitrideAlloyScanning electron microscopeAluminium alloyNitrideMetallurgySiliconLayer (electronics)Aluminum Alloys Composites PropertiesAdvanced ceramic materials synthesisMXene and MAX Phase Materials