Paper Titles
Mechanical Properties of Ti-Nb Biomedical Shape Memory Alloys Containing 13- and 14-Group Elements
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Wear Loss and Elution of C.P.Ti and Titanium Alloys in Simulated Body Fluids
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Effect of Zr Addition on Phase Constitution and Heat Treatment Behavior of Ti-25mass%Nb Alloys
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Ambiguous Transition from Fretting to Sliding of Biomedical Alloys
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Biomedical Properties of Tantalum Coatings Prepared by Multi Arc Ion-Plating
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Investigation on Near-β Titanium Alloy Ti-5Zr-3Sn-5Mo-15Nb for Surgical Implant Materials
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An Improvement in Sintering Property of β-Tricalcium Phosphate by Addition of Calcium Pyrophosphate and Calcium Carbonate
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Gene Expressions Induced by Calcium Phosphate Ceramics after Implantation into the Muscle of Rat
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Improving the Interconnectivity of Chitin-Gel-Cast Porous Calcium Phosphate Ceramics by Different Acid Etching Approaches
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Biomedical Properties of Tantalum Coatings Prepared by Multi Arc Ion-Plating

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Abstract:

Ti-50.6 at.% Ni shape memory alloy was coated with tantalum using multi arc ion-plating technique with the aim to increase its radiopacity and biocompatibility. The surface characteristics were investigated by X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The results of XPS survey spectra show that a thin oxide film are formed inside tantalum coating as a result of natural passivation of Ta in atmosphere. The hemocompatibility was evaluated in vitro by clotting time and platelet adhesion measurement. The results of our study showed that the clotting time of tantalum was higher than that of the TiNi alloys and no sign of accumulation and only slight pseudopodium was observed on the tantalum coatings, suggesting that the tantalum coatings can improve the biocompatibility of TiNi alloy.

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Periodical:

Materials Science Forum (Volumes 475-479)

Pages:

2349-2352

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.475-479.2349

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Online since:

January 2005

Authors:

Wei Cai, Y. Cheng, Y.F. Zheng, Hong Tao Li, Lian Cheng Zhao

Keywords:

Coating, Hemocompatibility, Ion-Plating, Tantalum, TiNi Alloy

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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