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Initial exploration of Ti–Ta, Ti–Ta–Ir and Ti–Ir alloys: Candidate materials for coronary stents

Paper ID Volume ID Publish Year Pages File Format Full-Text
1589 86 2008 7 PDF Available
Title
Initial exploration of Ti–Ta, Ti–Ta–Ir and Ti–Ir alloys: Candidate materials for coronary stents
Abstract

The objective of this study was to explore titanium alloys with increased elastic modulus and improved radiopacity, with a view to utilizing titanium in balloon-expandable coronary stents. Ti–50Ta, Ti–45Ta–5Ir and Ti–17Ir alloys were prepared using arc-melting techniques. Microstructural and tensile properties were evaluated in solution-treated conditions for each alloy, and also in aged conditions for the Ti–17Ir. An elastic modulus of 128 GPa was recorded for the Ti–17Ir alloy and this high value is attributed to the stiff Ti3Ir phase present in the eutectoid structure observed. The mechanical properties recorded, in addition to improved radiopacity, make the Ti–17Ir alloy more suitable for stent applications than commercially available titanium materials. Corrosion resistance and biocompatibility have not been assessed but the noble characteristics of iridium suggest that these aspects will be acceptable.

Keywords
Titanium; Elastic modulus; Stent; Iridium; Eutectoid
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Initial exploration of Ti–Ta, Ti–Ta–Ir and Ti–Ir alloys: Candidate materials for coronary stents
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 4, Issue 5, September 2008, Pages 1553–1559
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