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

Barry O'Brien; Jon Stinson; William Carroll

doi:10.1016/j.actbio.2008.03.002

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

Barry O'Brien
, Jon Stinson
, William Carroll

Research output: Contribution to a Journal (Peer & Non Peer) › Article › peer-review

27 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1553-1559
Number of pages	7
Journal	Acta Biomaterialia
Volume	4
Issue number	5
DOIs	https://doi.org/10.1016/j.actbio.2008.03.002
Publication status	Published - Sep 2008
Externally published	Yes

Keywords

Elastic modulus
Eutectoid
Iridium
Stent
Titanium

Access to Document

10.1016/j.actbio.2008.03.002

Cite this

@article{34604fbca7714e02891ccf5cfbdb6e10,

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 = "Elastic modulus, Eutectoid, Iridium, Stent, Titanium",

author = "Barry O'Brien and Jon Stinson and William Carroll",

year = "2008",

month = sep,

doi = "10.1016/j.actbio.2008.03.002",

language = "English",

volume = "4",

pages = "1553--1559",

journal = "Acta Biomaterialia",

issn = "1742-7061",

publisher = "Acta Materialia Inc",

number = "5",

}

TY - JOUR

T1 - Initial exploration of Ti-Ta, Ti-Ta-Ir and Ti-Ir alloys

T2 - Candidate materials for coronary stents

AU - O'Brien, Barry

AU - Stinson, Jon

AU - Carroll, William

PY - 2008/9

Y1 - 2008/9

N2 - 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.

AB - 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.

KW - Elastic modulus

KW - Eutectoid

KW - Iridium

KW - Stent

KW - Titanium

UR - https://www.scopus.com/pages/publications/48449091608

U2 - 10.1016/j.actbio.2008.03.002

DO - 10.1016/j.actbio.2008.03.002

M3 - Article

SN - 1742-7061

VL - 4

SP - 1553

EP - 1559

JO - Acta Biomaterialia

JF - Acta Biomaterialia

IS - 5

ER -

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

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this