Surface characterization on alkali-heat-treatment on titanium alloy; [Pencirian rawatan alkali-haba ke atas permukaan aloi titanium]

• Published in: Malaysian Journal of Analytical Sciences
• Main Author: Hanib N.H.; Hamzah F.; Omar Z.; Subuki I.
• Format: Article
• Language: English
• Published: Malaysian Society of Analytical Sciences 2016
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85003545653&doi=10.17576%2fmjas-2016-2006-23&partnerID=40&md5=cfd7bf2b2ccfb8aa6d3be555320d34ea

Coating of apatite in a biomimetic fluid is an alternative technique for metallic coating. Key element for effective biomimetic apatite coating depends on the surface material that can be enhanced by physical and chemical pre-treatment process. Two different preparations of Titanium alloy (Ti6Al4V) have been studied namely as received (as-Ti) and abraded (ab-Ti) with SiC paper. Both samples were then immersed in 5M NaOH and 5M KOH at temperature of 60 °C for 24 hours. A passive oxide layer covered on the surface of Ti6Al4V generally changed to form alkali (Na/K) titanate layer which is mechanically unstable. Therefore, alkali-treated Ti6Al4V were heat-treated at 700 °C for 1 hour to consolidate a mechanically stable structure of amorphous alkali titanate layer. Both samples before and after heat treatment were characterized using field emission scanning electron microscope, 3D surface metrology, contact angle goniometry and X-ray diffraction. The result indicates that as-Ti treated in 5 M KOH showed an existence of porous network structure. © 2016, Malaysian Society of Analytical Sciences. All rights reserved.