Sintering behavior and characteristic of bio-based hydroxyapatite coating deposited on titanium
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Deposition of hydroxyapatite derived from bio-waste eggshell on titanium substrate via electrophoretic deposition method andthe thermal stability of the resulting coating were investigated. The coated substrates was sintered at different temperatures ranging from 900 oC to 1100 oC in argon atmosphere prior to characterisation. The results indicated that a crack-free HA coating layer having an average thickness of 20 µm was successfully deposited at the optimum temperature of 1050 oC. The XRD analysis indicated that the sintered coated substrates was fully HA phase and was stable up to 1050 oC, with Ca/P ratioof 1.67. The SEM results showed that good bonding was achieved between the HA coating and the Ti substrate. There was also no secondary phase formation at the joint interface. This study demonstrate the viability of using electrophoretic deposition method to coat a thin layer of bio-based HA onto titanium without disrupting the biocompatibility nature of the HA phase.
Abstract
Deposition of hydroxyapatite derived from bio-waste eggshell on titanium substrate via electrophoretic deposition method andthe thermal stability of the resulting coating were investigated. The coated substrates was sintered at different temperatures ranging from 900 oC to 1100 oC in argon atmosphere prior to characterisation. The results indicated that a crack-free HA coating layer having an average thickness of 20 µm was successfully deposited at the optimum temperature of 1050 oC. The XRD analysis indicated that the sintered coated substrates was fully HA phase and was stable up to 1050 oC, with Ca/P ratioof 1.67. The SEM results showed that good bonding was achieved between the HA coating and the Ti substrate. There was also no secondary phase formation at the joint interface. This study demonstrate the viability of using electrophoretic deposition method to coat a thin layer of bio-based HA onto titanium without disrupting the biocompatibility nature of the HA phase.
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