Tribological and Corrosion analysis of Co-20Al-GNSA composites produced through powder metallurgy process

Abstract

Abstract In this study,Co-20Al-GNSA metal matrix composites were produced using mechanical alloying process. The Co-20Al-GNSA composites were mixed using a high-energy ball mill at a constant speed of 350 rpm for 2hours. The composite powders were then characterized for their morphological study using Scanning Electron Microscope. The composite powders are then compressed and sintered at 500MPa and 700°C respectively. The density and compressive strength of the composite materials shows decrement values whereas the wear resistance of the composite materials has increased considerably. The mechanism of wear was identified as abrasive wear. The electrochemical corrosion test also reveals that the Co-20Al-10GNSA composites have better corrosion resistance. The weight-loss corrosion test also shows that the composites with 10GNSA content have better corrosion resistance.