Coating of different silica sources containing hydroxyapatite for Ti6Al4V metal substrate using HVOF technique
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Biomaterials have been used to replace or support the human organs or tissues in many years. Titanium and its alloys are metallic biomaterials which bond strongly with bone and are compatible with the surrounding tissue. Hydroxyapatite (HAp:Ca10(P04)6(OH)2) is a calcium phosphate–based bioceramics and mostly used in coating of metallic biomaterials. In this study, HAp and bioactive glass powders were successfully prepared by sol-gel method. Diatomite, quartz sand, and bioactive glass were selected as SiO2 sources. Then, different SiO2 source–added HAp bioceramics were coated on Ti6AI4V metal substrate by HVOF method. Then, the characterization of the coatings was investigated. Thermal analysis of HAp powders was characterized by using TG-DSC. Mineralogical analysis of the coating material was performed by using XRD. Thicknesses and morphological analysis of the coating were done by SEM. According to the TG results, the total weight loss of HAp powers is 11.44% in the 100–1000 °C range. The characteristic peaks of HAp (2θ = 26° and 32°) were observed for pure HAp and doped HAp powders. Tricalcium phosphate (TCP) as secondary phases was detected in doped HAp powders. Pure HAp coating thickness was 186 μm. The thickness of coating decreased with additive as pure HAp.
KeywordsBioceramics Hydroxyapatite Diatomite Implant Sol-gel Coating HVOF
PACS87.85.jj 81.20.Fw 52.77.Fv 81.15.Rs
This study has been performed within the project of 15.FEN.BİL.24 under the support of Afyon Kocatepe University Scientific Research Projects Coordination Unit.
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