The effect of low temperature plasma treatment on the surface characteristics of Ti-40Nb-1Hf alloy
Date Issued
2006
Date
2006
Author(s)
Chang, Chen-Ting
DOI
zh-TW
Abstract
Titanium and its alloys are widely used in biomedical equipments and components, due to their properties such as relatively lower modulus, good fatigue strength, corrosion resistance and biocompatibility. The aim of this study was to investigate the effect of low temperature plasma treatment on the surface characteristics of Ti-40Nb-1Hf alloy, and further to examine the biocompatibility of the treated alloy. The crystal structure, chemical compositions, surface topographies, wettability as well as cell morphology were investigated by using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), water contact angle measurement and scanning electron microscope (SEM).
The results of XRD analysis indicate that plasma oxidation induces the formation of titanium oxide. Furthermore, the intensity of the β-Ti peak increases with increasing plasma energy. In addition, the XPS data reveal that the rate of TiO2 and Nb2O5 in the oxide layer increases after being O2 plasma treated. Surface properties were studied by the atomic force microscopy (AFM) and contact angle analysis. The results show that as the power of O2 plasma increases, both the surface roughness and water contact angle decrease.
Regarding the biocompatibility, the cell count analysis and SEM observations of the plasma-treated Ti-40Nb-1Hf alloy show that the cell activity of specimens with plasma treatment is better than those without plasma treatment, and hence, the biocompatibility of the Ti-40Nb-1Hf alloy can be expected to improve.
Subjects
Ti-40Nb-1Hf合金
低溫電漿
生物相容性
Ti-40Nb-1Hf
low temperature plasma
biocompatibility
Type
thesis
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