Ultraviolet-accelerated formation of bone-like apatite on oxidized Ti–24Nb–4Zr–7.9Sn alloy

doi:10.1007/s11706-013-0225-5

Front Mater Sci

2013, Vol. 7

Issue (4) : 362-369 https://doi.org/10.1007/s11706-013-0225-5

RESEARCH ARTICLE

Ultraviolet-accelerated formation of bone-like apatite on oxidized Ti–24Nb–4Zr–7.9Sn alloy

Min-Fang CHEN¹(

), Jing ZHANG¹, Chen YOU^1,2

1. School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China; 2. Tianjin Key Laboratory for Photoelectric Materials and Devices, Tianjin 300384, China

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Abstract

A novel method has been developed to rapidly deposit bone-like apatite with the assistance of ultraviolet (UV) light irradiation on the nanostructured titania in the simulated body fluid (SBF). The process has three main steps: Ti–24Nb–4Zr–7.9Sn alloy was heated at 650°C for 3 h, UV-light illumination in air for 4 h and soaking in the SBF for 3 d. A titania coating consisted of main rutile formed on the thermal oxidized Ti–24Nb–4Zr–7.9Sn alloy. The UV not only converted the rutile surface from hydrophilic to hydrophobic but also stimulated high surface activity. After 4 h UV illumination, the contents of Ti³⁺ and hydroxyl groups on the oxidized sample were increased, while that of lattice O decreased. After 3 d of soaking in the SBF, a compact and uniform layer of carbonated hydroxyapatite (CHA) particles was formed on the UV-illuminated rutile surface whereas there was a few of HA to be viewed on the surface of as-oxidized Ti–24Nb–4Zr–7.9Sn alloy. Our study demonstrates a simple, fast and cost-effective technique for growing bone-like apatite on titanium alloys.

Keywords Ti–24Nb–4Zr–7.9Sn alloy thermal oxidation UV illumination rutile bone-like apatite

Corresponding Author(s): CHEN Min-Fang,Email:mfchentj@126.com

Issue Date: 05 December 2013

Cite this article:

Min-Fang CHEN,Jing ZHANG,Chen YOU. Ultraviolet-accelerated formation of bone-like apatite on oxidized Ti–24Nb–4Zr–7.9Sn alloy[J]. Front Mater Sci, 2013, 7(4): 362-369.

URL:

https://academic.hep.com.cn/foms/EN/10.1007/s11706-013-0225-5
https://academic.hep.com.cn/foms/EN/Y2013/V7/I4/362

Fig.1 XRD patents of β-type Ti–24Nb–4Zr–7.9Sn samples thermal oxidized at 550°C and 650°C.

Fig.2 Surface morphology of the samples oxidized at (a) 550°C and (b) 650°C for 3 h.

Fig.3 UV irradiation time dependence of the water contact angle of thin films oxidized at 550°C and 650°C.

Fig.4 The images of measuring water contact angle of β-type Ti–24Nb–4Zr–7.9Sn oxidized at 650°C (a) before and (b) after UV illumination.

Fig.5 Ti 2p binding energy spectra deconvoluted using a Gaussian distribution function of 650°C thermal oxidation treated β-type Ti–Nb–Sn alloys (a)(c) before and (b)(d) after UV illumination, respectively.

Tab.1 The quantitative analysis of XPS spectra of Ti 2p and O 1s

Fig.6 SEM images of Ti–24Nb–4Zr–7.9Sn alloys irradiated by UV and soaked in SBF for 1 d,unirradiated and soaked in SBF for 1 d, unirradiated and soaked in SBF for 3 d, and irradiated by UV and soaked in SBF for 3 d. EDS pattern of newly-formed film of Ti–24Nb–4Zr–7.9Sn alloy.

Fig.7 XRD patterns of 650°C thermal oxidation treated β-type Ti–Nb–Sn alloys after UV illumination calcified in the SBF solution at 37°C at regular intervals.

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