Publication
Title
TEM study of the mechanism of Ni ion release from Nitinol wires with original oxides
Author
Abstract
The surface of commercial Nitinol wires with original oxides and a thickness in the 30-190 nm range was investigated by different state of art TEM techniques. The oxide surface layer was identified as a combination of TiO and TiO2 depending on the processing of the wire. Between the core of the wires and the oxidized surface, an interfacial Ni3Ti nanolayer was observed while Ni nanoparticles are found inside the original oxide. The particle sizes, their distribution in the surface and the Ti-O stoichiometry were deduced from the analysis of the obtained data. Molecular dynamics calculations performed for evaluation of the stability of Ni particles relative to the atomic state revealed that a pure Ni particle has a lower energy than free Ni atoms inside the TiO2 lattice. The obtained results are discussed with respect to surface stability and Ni release in the human body.
Language
English
Source (book)
Proceedings of the 8th European Symposium on Martensitic Transformations (ESOMAT 2009), September 7-11, 2009, Prague, Czech Republic / Sittner, P. [edit.]; et al. [edit.]
Publication
Coutaboeuf : EDP, 2009
ISBN
978-2-7598-0480-1
Volume/pages
p. 05027,1-05027,6
ISI
000274582300092
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 28.04.2010
Last edited 22.07.2017
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