OPTI MIZATION OF THE SQUEEZE CAST Y2O3/Al-Si COMPOSITES BY MERIT RATING METHOD

Abstract

ABSTRACTIn this paper, Y2O3/Al–Si composites are prepared by squeeze casting process andmerit rating method is used to optimize the squeeze casting process parameters. Awear rate and hardness tests were conducted and the density is calculated for theresulted castings. The primary objective is to use merit rating method to find a bettergroup of parameters that give the good balance of high density and hardness with lowwear rate. The evaluated squeeze casting parameters are pouring temperature, dietemperature, and squeeze pressure. The experimental and analytical results showedthat the merit rating method was successful in determining the group of parametersthat give an optimum balance of properties. Also it showed that if the difference inany property values among specimens is high, it can affect the selection process withthe importance sequence.