Aluminum Silicon Carbide Particulate Metal MatrixudComposite Development Via Stir Casting Processing

摘要

In this paper, conventional simple methods ofudQ1udud producing MMC with attained properties through the disudpersion of silicon carbide in the matrix were investi11udgated. To achieve these objectives two step-mixing methodud of stir casting technique has been employed. Aluminumud(99.66 %C.P) and SiC (320 and 1200 grits) were chosenudas matrix and reinforcement materials respectively. Experudiments were conducted by varying weight fraction of SiCud for 2.5 %, 5.0 %, 7.5 % and 10 %. The result indicatedud that the stir casting method was quite successful to obtainud uniform dispersion of reinforcement in the matrix. Thisud was evident by the improvement properties of compositesud over the base metal. Reinforced Aluminium Silicon Carudbide (ASC) showed increase in Young’s Modulus (E) andud hardness above the unreinforced case and marginal reducudtion of electrical conductivity was recorded for the comudposites. The silicon carbide of 1200 grits (3 μm) showedud increased Young’sModulus (E) and hardness of 1517.6Mpaud and 26.1 Hv values at 7.5% volume fraction silicon carbidewhen compared with the silicon carbide 320 grit (29 μm)Also; the electrical conductivity properties of the two grit udsizes of the Silicon Carbides were less than the base metal udfor all the volume fraction of Silicon Carbide