Effect of Surface Treatment on Bioactivity of Ti-6Al-4V Alloy

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Omidi Razani, Abbas Ali | 2011

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 41554 (07)
University: Sharif University of Technology
Department: Materials Science and Engineering
Advisor(s): Asgari, Sirous
Abstract:
In this research Ti-6Al-4V samples were surface treated with acid, alkali and sandblasting treatment. Alkali treatment parameter was the NaOH concentration. The results of roughness measurement demonstrate that increase in NaOH Concentration results in rougher surface. Sandblasting produces rough surfaces in the scale of 1 to 10 micrometers. Acid treatment reduces initial roughness and the resultant roughness is in the under micrometer scale. After surface treatment, samples were soaked in simulated body fluid for invitro assessment. Results of this analysis indicate that sample with sandblasting+chemical treatment has the best invitro bioactivity. Chemical+sandblasting treated sample shows the medium bioactivity with less entrapped alumina. In the alkali treated samples, increase in NaOH concentration results in better invitro bioactivity. Bioactivity of this alloy is function of morphology and chemistry of surface simultaneously.
Keywords:
Bioactivity ; Titanium Alloy 6AL-4V ; Alkali Treatment ; Sandblasting ; Osseointegration

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