Suresh Kumar | Thapar University, Patiala (original) (raw)
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The present study aims to analyze the effect of particle size on nature of microstructural featur... more The present study aims to analyze the effect of particle size on nature of microstructural features
and wear behavior of composite. Stir casting route has been adopted for the fabrication of
aluminium matrix composite using Al-Si LM13 piston alloy. Composites have been developed by
varyig the size of zircon sand particles while keeping the SiC particles of same size.
Microstructural analysis shows that SiC has a pronounced effect on the microstructure and eutectic
silicon refinement. Microstructure evolution is mainly governed by the thermal conductivity
difference between two phase’s i.e. ceramic particle and alloy matrix. The dendritic ripening is also
observed in the composites in microstructural study. EDS analysis reveals the formation of
mechanically mixed layer in the composites enabling better wear properties. Fine size zircon sand
particle reinforced composite exhibits better wear resistance than coarse particle at same weight
percentage of reinforcement. The SiC reinforcement is better as compared to zircon sand particles
for enhancing wear resistance of the composite. Silicon carbide refines the eutectic silicon whereas
zircon sand provides good interfacial bonding. SEM examination of worn surface and wear debris
shows that the various wear mechanism are involved in material removal.
The present study aims to analyze the effect of particle size on nature of microstructural featur... more The present study aims to analyze the effect of particle size on nature of microstructural features
and wear behavior of composite. Stir casting route has been adopted for the fabrication of
aluminium matrix composite using Al-Si LM13 piston alloy. Composites have been developed by
varyig the size of zircon sand particles while keeping the SiC particles of same size.
Microstructural analysis shows that SiC has a pronounced effect on the microstructure and eutectic
silicon refinement. Microstructure evolution is mainly governed by the thermal conductivity
difference between two phase’s i.e. ceramic particle and alloy matrix. The dendritic ripening is also
observed in the composites in microstructural study. EDS analysis reveals the formation of
mechanically mixed layer in the composites enabling better wear properties. Fine size zircon sand
particle reinforced composite exhibits better wear resistance than coarse particle at same weight
percentage of reinforcement. The SiC reinforcement is better as compared to zircon sand particles
for enhancing wear resistance of the composite. Silicon carbide refines the eutectic silicon whereas
zircon sand provides good interfacial bonding. SEM examination of worn surface and wear debris
shows that the various wear mechanism are involved in material removal.