This paper deals with the assessment of dispersiod content and the effect of chill for improved mechanical properties. Investigation is carried out to evaluate Ultimate Tensile Strength (UTS), Fracture toughness, Hardness, and microstructure of chilled aluminum matrix and quartz particulate composite. In the present work, Quartz (SiO2) particles ranging from 30- to 100μm were chosen as dispersiod and added, ranging from 3 to 12 wt% in steps of 3%. The composite was prepared by stir-casting technique and poured into the sand molds incorporated with non-metallic and metallic chills. Test result showed that this MMC was greatly influenced by the dispersiod and chills. Fracture toughness & UTS of the composite are found to depend on the wt% of the dispersiod and chilling medium. It is observed that chill has influenced hardness of the composite. Volumetric heat capacity (VHC) of the chill is found to increase the amount of heat absorbed. Microstructure analysis also reveled uniform distribution of the dispersiod, which results in improved properties of the particulate metal matrix composite.

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