Self-organized TiO2 nanotube layer on Ti-6Al-7Nb for biomedical application

SURFACE & COATINGS TECHNOLOGY

卷:265

Article

Rafieerad, A. R.^1,2  Zalnezhad, E.^1,2  Bushroa, A. R.^1,2  Hamouda, A. M. S.³  Sarraf, M.^1,2  Nasiri-Tabrizi, B.^1,4 

[1] Univ Malaya, Fac Engn, Dept Mech Engn, Kuala Lumpur 50603, Malaysia

[2] Univ Malaya, Dept Engn, Ctr Adv Mfg & Mat Proc, Kuala Lumpur 50603, Malaysia

[3] Qatar Univ, Coll Engn, Mech & Ind Engn Dept, Doha, Qatar

[4] Univ Malaya, Fac Engn, Dept Biomed Engn, Kuala Lumpur 50603, Malaysia

关键词: Anodization;    Ti-6Al-7Nb;    TiO2 nanotube;    Surface wettability;   

DOI  :  10.1016/j.surfcoat.2015.01.067

来源: Elsevier

【 摘 要 】

In the present study, a self-organized nanotube TiO2 layer on Ti-6Al-7Nb was fabricated. The influence of acidic electrolytes including glycerol (G) and ethylene glycol (EG) on the anodization, microstructural features and surface wettability was explored. The phase compositions and morphological characteristics were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM), respectively. According to the results, due to the intrinsic amorphous feature of ceramic oxide, the characteristic TiO2 peaks were not detected in the XRD profiles. After annealing in normal atmosphere at 600 degrees C for 2 h, TiO2 crystallized and consequently, nanotubular TiO2 arrays containing anatase and rutile phases formed. From a microstructural point of view, the average length and diameter of the nanotube array ranged from 2.23 to 4.22 mu m and 160 to 170 nm, respectively. Besides, the type of acidic electrolyte and subsequent annealing noticeably affected the surface wettability of the products. (C) 2015 Elsevier B.V. All rights reserved.

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