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Surface elastic properties of Ti alloys modified for medical implants: A force spectroscopy study

Paper ID Volume ID Publish Year Pages File Format Full-Text
2573 116 2007 7 PDF Available
Title
Surface elastic properties of Ti alloys modified for medical implants: A force spectroscopy study
Abstract

We report here the first nanoscale surface elasticity measurements on surface-modified titanium alloys using the force spectroscopy mode in scanning force microscopy. Samples of three vanadium-free titanium alloys, Ti–7Nb–6Al, Ti–13Nb–13Zr and Ti–15Zr–4Nb, were investigated. Surface modification of the three alloys was produced by thermal oxidation in air at 750 °C for different times, which resulted in the formation of protective oxide layers with different surface composition and morphology. The elastic properties of the surface layers were studied comparatively in the as-received Ti alloys and after the oxidation process using cantilevers with different stiffness to evaluate the influence of the indentation depth. In all cases, Young’s modulus of the sample surfaces was found to be lower than 65 GPa, and as low as 20 GPa for some of the oxidized samples. Variations observed for the three oxidized Ti alloys can be related to the different chemical composition of the outer layers generated for the different oxidation times.

Keywords
Nanoindentation; SFM (scanning force microscopy); Biomaterials; Metal alloy; Elastic behavior
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 3, Issue 1, January 2007, Pages 113–119
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us