Surface Modification of Ti-Nb Alloy in Alkaline Solution to Enhance Bioactivity

Abstract:

Titanium alloys, especially titanium-niobium alloy have been reported as a potential biomaterial with good biocompatibility and non-toxicity. However, there is a lack of studies in alkaline surface treatment of new beta titanium alloy fabricated by vacuum arc melting (VAM) and powder metallurgy (PM) technique with high addition of niobium percentage. The purpose of this research was to examine the feasibility of surface modification on new beta Ti-40wt% Nb alloy in sodium hydroxide solution in order to form bioactive alkaline titanate layer. The characterization involved in this study is X-ray diffraction analysis (XRD), scanning electron microscope (SEM), microhardness, density measurement and optical microscope (OM). Development of amorphous alkaline titanate layer consisted of titanium hydrate, sodium titanate and oxide mixture of titanium oxide, niobium, niobium oxide were revealed by XRD. SEM shows titanate hydrogel layer form on Ti alloy PM thicker than on Ti alloy VAM. Microhardness and density measurement for Ti alloy VAM is greater than Ti alloy PM. OM shows porous surface on Ti alloy PM compare to VAM. This research suggests that the formation of sodium titanate layer on the surface of Ti-Nb alloy enhance bioactivity with better osteointegration and present higher formation of apatite which is crucial for the desired biomedical implant.

• Periodical: Key Engineering Materials (Volume 965)
• Pages: 51-58
• DOI: https://doi.org/10.4028/p-Qk8stz
• Online since: November 2023
• Authors: Nur Adila Amira Basry, Zuhailawati Hussain*, Khairul Anuar Shariff, Ahmad Lutfi Anis, Widyani Darham
• Keywords: Alkaline Treatment, Bioactivity, Titanium-Niobium Alloy

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