Mathematical model for weight fraction of reinforcement addition in a metal matrix through powder metallurgy route

Abstract

Metal matrix composite has high specific strength and it retained its properties at high-temperature application compared to traditional materials. In the present work, a novel mathematical model has been developed for the weight percentage of reinforcement addition in a specified weight of the matrix using a theoretical approximation. This model provides the maximum weight fraction of reinforcement addition in a metal matrix. Further, the developed model has been demonstrated experimentally using alumina and SiC as reinforcement particles with the aluminium matrix synthesized by the powder metallurgy (PM) technique. The sintered samples were cut along the transverse plane, thereafter polished for microstructural observation. Microstructures of these samples show the distribution of reinforcement particles in the aluminium matrix. The interface of Al-SiC and Al-alumina also investigated for different weight fractions of reinforcements. The developed model can be used for calculating the maximum weight fraction of reinforcement in a matrix for making any composite materials using the PM process.