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Novel sphene coatings on Ti–6Al–4V for orthopedic implants using sol–gel method by Chengtie Wu; Yogambha Ramaswamy; David Gale; Wenrong Yang; Keqin Xiao; Liangchi Zhang; Yongbai Yin; Hala Zreiqat is a Engineering article available to read on EtoBox.

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Hydroxyapatite (HAp) is commonly used to coat titanium alloys (Ti-6Al-4V) for orthopedic implants. However, their poor adhesion strength and insufficient long-term stability limit their application. Novel sphene (CaTiSiO 5 ) ceramics possess excellent chemical stability and cytocompatibility. The aim of this study is to use the novel sphene ceramics as coatings for Ti-6Al-4V. The sol-gel method was used to produce the coatings and the thermal properties, phase composition, microstructure, thickness, surface roughness and adhesion strength of sphene coatings were analyzed by differential thermal analysis-thermal gravity (DTA-TG), X-ray diffraction (XRD), scanning electron microscopy (SEM), atom force microscopy (AFM) and scratch test, respectively. DTA analysis confirmed that the temperature of the sphene phase formation is 875 °C and XRD analysis indicated pure sphene coatings were obtained. A uniform structure of the sphene coating was found across the Ti-6Al-4V surface, with a thickness and surface roughness of the coating of about 0.5-1 lm and 0.38 lm, respectively. Sphene-coated Ti-6Al-4V possessed a significantly improved adhesion strength compared to that for HAp coating and

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Author

Chengtie Wu; Yogambha Ramaswamy; David Gale; Wenrong Yang; Keqin Xiao; Liangchi Zhang; Yongbai Yin; Hala Zreiqat

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1742-7061)

Published

2008

Language

EN

Field

Engineering (Physical Sciences)