2018•DergiPark (Istanbul University)Requires access
EFFECTS OF ZnO AND GRAPHITE PARTICULATES ON MECHANICAL AND WEAR CHARACTERISTICS OF Al-Si ALLOY HYBRID COMPOSITES
Stephen Idowu Durowaye, Olatunde Israel Sekunowo, Ganiyu Ishola Lawal, James ORJI
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Abstract
Aluminiumalloys exhibit some outstanding properties which make them to be widely used inmany applications. This study examined the effect of particles of ZnO andgraphite on mechanical and wear characteristics of Al-Si alloy hybridcomposites developed by stir casting method for automotive application. Zincoxide and graphite particles were thoroughly mixed in varied weight fractions(11, 14, and 17 wt. %) with Al-Si alloy. The hybrid composite exhibited thehighest hardness and tensile strength values of 113.67 VHN and 163.67 MParespectively at 14 wt. % particles addition. The volume loss during wearincreased with speed and load but was marginal in the reinforced samples. Themicrostructure showed good dispersion of particles of ZnO and graphite in theAl-Si alloy. The mechanical and wear characteristics of the composites wereenhanced by the uniform distribution of the ZnO and graphite particles in theAl-Si alloy matrix and the strong adhesion of alloy-particles phases.