Microstructure, tribological and mechanical strengthening effect of multiphase Zn/ZrO2-SiC electrodeposited composite coatings
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Springer-Verlag London
Abstract
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In an attempt to improve the mechanical and thermal
resilient properties of mild steel, Zn-ZrO2-SiC composite
coating was fabricated from zinc-based sulphate electrolyte
with incorporated composite particles of ZrO2/SiC at 2.0
A/cm2 for 10 min. The effects of particle on the mechanical
properties were examined using scanning electron microscope
attached with energy dispersion spectroscopy and atomic
force microscopy. The micro-hardness and wear resistance
behaviour were determined with high diamond microhardness
tester and three body abrasive MTR-300 testers with
dry sand rubber wheel apparatus with 5 N. The fabricated
coating was thermally heated at 200 °C for 4 h to evaluate
the coating stability. From the results, a modification in the
microstructure and topographic orientation as a result of incorporated
composite was noticed on the zinc matrix. The
mechanical and thermal properties were observed to be considerably
improved by the incorporation of the ZrO2/SiC
weight fraction. A significant improvement in wear and
hardness properties were also obtained for the multiphase
embedded coatings
Keywords
T Technology (General), TJ Mechanical engineering and machinery