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Abrasive Wear Studies on Cobalt Electrodeposited Surfaces with Tio2 Dispersions

D. Kalyanaraman
SUDHARSAN ENGINEERING COLLEGE, SATHIAMANGALAM - 622501, PUDUKOTTAI DISTRICT, TAMINNADU, INDIA, IN

Keywords:
tribological coatings, microhardness, wear index, Tio2 dispersions

Abstract:
Cobalt depositions are generally preferred for high temperature applications. When a second phase of fine tough particles are incorporated in the coating matrix, Tribological properties are found to have improved much. The performance of such composite depositions have rarely been assessed towards different mating conditions. Cobalt depositions with engulfed TiO2 particles were studied for their performance towards abrasive wear and are reported. Effect of heat treatment of these depositions on the surface mechanical properties were studied. Surface microhardness and wear loss due to rubbing abrasion were estimated on coated panels before and after heat treatment in the range of 100-700°C. The composite containing 12.5% by volume of TiO2 and heat treated at 600-700°C were found to exhibit high abrasion resistance. This is attributed to the formation of glass like layers on the surface.

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