Adhesion Strength of Hydroxyapatite Coating on Titanium Alloy (Ti-6Al-4V ELI) for Biomedical Application

Author:

Gunawarman ,Affi Jon,Sutanto Agus,Putri Dian Mustika,Juliadmi Dian,Nuswantoro Nuzul Ficky,Fajri Hidayatul,Tjong Djong Hon,Manjas Menkher

Abstract

Abstract Implantation using titanium Ti-6Al-4V ELI still has disadvantages, in particular, low osseointegration cause of less bioactive of the material. Hydroxyapatite was then applied as a coating material to increase the bioactivity and the osseonintegration as well. The Ti-6AL-4V ELI samples were coated with the hydroxyapatite using the electrophoretic deposition (EPD) method, with voltage variations of 5, 8 and 11 volts for 5 minutes and variations in deposition time for 5,8 and 11 minutes with voltage of 8 volt. Surface properties (coarseness, coating mass, thickness, and surface coverage) were then determined by using related equipments. Adhesion strength the HA layer was tested a cross-cut test method. The results showed that the EPD could be used properly to coat the Ti-6Al-4V ELI material with hydroxyapatite. Voltage and deposition time influence coating layer properties that is related to adhesion bonding of the layer on the metal surface. Applying the voltage of 8 volt for 5 minutes resulted in optimal surface properties with coating roughness of hydroxyapatite layer (Ra) as much as 0.88. The removed area after the cross-cut tape test is 2.25%, which means adhesion strength between the coating layer and the subtrate is high enough. A relatively high hydroxyapatite mass (0.3 mg), is covering the material surface with a surface coverage of 82.1%, and the average coating thickness is 73.3 μm. Such kind of coating layer characteristics could improve bioactivity, biocompatibility and thus enhancing osseonintegration capacity of prosthetic medical implants.

Publisher

IOP Publishing

Subject

General Medicine

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