Mechanical properties of electrophoretically deposited 45S5 bioglass-graphene oxide composite coatings
Authors
Abstract:
Bioglass-graphene oxide composites can be served as a high-potential candidate for biomedical applications due to its specific mechanical properties. In this study, the 45S5 bioactive glass (BG) - graphene oxide (GO) composite containing 2 wt. % GO was coated on titanium alloy via electrophoretic deposition process (EPD). The synthesized GO was incorporated into BG coating to improve the mechanical properties.The X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy SEM equipped with energy dispersive spectroscopy were utilized for the characterization of phase, structural agents, microstructure and composition, respectively. According to a linear elastic fracture mechanics, the bonding strength and fracture toughness of coatings were evaluated by applying the micro-scratch test under a progressive load. The highest values of Pc1= 4.80 and Pc2= 5.37 GPa, as critical contact pressures as well as critical distances of cracking and coating delamination, and the highest fracture toughness of KIC= 0.885 MPa.m1/2 were achieved for BG-GO composite coating.
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Journal title
volume 5 issue 4
pages 15- 21
publication date 2019-12-01
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