Bond-coating in plasma-sprayed calcium-phosphate coatings |
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| Authors: | F. N. Oktar M. Yetmez S. Agathopoulos T. M. Lopez Goerne G. Goller I. Ipeker J. M. F. Ferreira |
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| Affiliation: | (1) Department of Industrial Engineering, School of Engineering, Marmara University, Goztepe Campus, Ziverbey, 34722 Kadikoy, Istanbul, Turkey;(2) Department of Radiology, School of Health Professions, Haydarpasa Campus, 34668 Haydarpasa, Uskudar, Istanbul, Turkey;(3) Department of Ceramics and Glass Engineering, University of Aveiro, 3810-193 Aveiro, Portugal;(4) Department of Mechanical Engineering, School of Engineering, Karaelmas University, 67100 Zonguldak, Turkey;(5) Department of Materials Science and Engineering, University of Ioannina, Greece, GR - 451 10, Ioannina, Greece;(6) Department of Chemistry, Autonomous Metropolitan University Iztapalapa, Mexico City, Mexico;(7) Department of Metallurgical and Materials Engineering, School of Chemical and Metallurgical Engineering, Istanbul Technical University, 80626 Maslak, Istanbul, Turkey;(8) Department of Chemical Engineering, School of Engineering, Marmara University, Goztepe Campus, Ziverbey, 34722 Kadikoy, Istanbul, Turkey |
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| Abstract: | The influence of bond–coating on the mechanical properties of plasma-spray coatings of hydroxyatite on Ti was investigated. Plasma-spray powder was produced from human teeth enamel and dentine. Before processing the main apatite coating, a very thin layer of Al2O3/TiO2 was applied on super clean and roughened, by Al2O3 blasting, Ti surface as bond-coating. The experimental results showed that bond-coating caused significant increase of the mechanical properties of the coating layer: In the case of the enamel powder from 6.66 MPa of the simple coating to 9.71 MPa for the bond-coating and in the case of the dentine powder from 6.27 MPa to 7.84 MPa, respectively. Both tooth derived powders feature high thermal stability likely due to their relatively high content of fluorine. Therefore, F-rich apatites, such those investigated in this study, emerge themselves as superior candidate materials for calcium phosphate coatings of producing medical devices. The methods of apatite powder production and shaping optimization of powder particles are both key factors of a successful coating. The methods used in this study can be adopted as handy, inexpensive and reliable ways to produce high quality of powders for plasma spray purposes. An erratum to this article is available at . |
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