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- 저자 : Krishna Kant Pandey (검색결과 1 건)
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Effect of Plasma Power on Corrosion Behaviour of Plasma Sprayed Hydroxyapatite Coatings
Swarnima Singh,Krishna Kant Pandey,Anup Kumar Keshri 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.11
Hydroxyapatite coating have been deposited on titanium alloys (Ti–6Al–4V) substrate by varying plasma power from 20to 35 kW using atmospheric plasma spraying. Effect of plasma power variation on the microstructure as well as corrosionbehaviour of the coatings has studied exhaustibly in simulated body fluid (SBF). Microstructural analysis revealed thatincreasing the plasma power from 20 to 35 kW has led to a more densified coating by minimizing the level of porosity andpartially melted region as well. This enhanced property is attributed to the higher velocity of the in-flight particles withtheir shorter residence time at 35 kW. The molten particles strike the substrate without losing much of its energy during itsflight, which further boosted the closed packing of the coating layers ensuing a reduced inter-splat region. These improvedmicrostructural properties also escorted to enhancement in corrosion resistance with increase in the plasma power. Thisenhancement in corrosion behaviour at higher power is attributed to reduction in pores and voids in the coatings whichhindered the penetration of SBF solution into the coatings.
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