Synthesis characterization and analysis of a1mg0 point 5si composites by powder metallurgy

Abstract

Aluminium alloy with silicon as alloying element finds more comprehensive applications and this induces the development of aluminium composite with the matrix AA6063 (AlMg0.5Si) alloy. The applications of aluminium composites are majorly in the automotive, defence and aerospace industries that need the engineered properties. Wear and friction are significant issues, and the effective method to overcome is the replacement of newer materials with self-lubrication properties.Considering the above requirements, an attempt is made to develop one such self-lubricating composite material with aluminium matrix is made with the addition of solid lubricant molybdenum disulfide. The percentage of molybdenum disulfide is varied up to 10 weight percentage and it was synthesized through powder metallurgy. The density and hardness of the developed composite was measured with the standard procedures. The investigation of wear performance of the developed self-lubricating composite was accomplished through the dry sliding wear analysis. The addition of solid lubricant enhanced the wear resistance even at the initial stage of the run and resulted in a steady state of wear from 200 m sliding distance. The wear mechanisms which influence the wear performance were detected through the microstructural examination, and it was discussed. newline