Influence of RF plasma sputtering power on surface properties and biocompatibility of CoCr alloy by deposition of CaTiO3 thin films

CaTiO3 coating was deposited on medical-grade CoCr base alloy by radio frequency magnetron plasma sputtering method. Investigated the influence of variable sputtering powers (75–225) watts on biocompatibility and corrosion rate. The deposition rate of CaTiO3 coating was get it to increase frequently in the range (0.4-1.1) nm/min, while varying the power in the range (75–225) watts, with a thickness of CaTiO3 coating was 50 nm at 100°C. The coated samples with CaTiO3 bio-ceramic, for measurements of corrosion a minor corrosion rate of (0.01102) mpy for a coated sample at sputtering power (225W) is observed as a significant improvement in corrosion properties, compared to the uncoated sample’s (1.35826) mpy. CaTiO3 coating CoCr substrates at different powers in the range (75-225) watts, at 21 days, were submerged in natural uniform hydroxyapatite. This study reveals a novel low-cost method for producing biocompatible materials with good corrosion resistance.