Number of the records: 1
On the Ni-Ion release rate from surfaces of binary NiTi shape memory alloys
- 1.
SYSNO ASEP 0485204 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title On the Ni-Ion release rate from surfaces of binary NiTi shape memory alloys Author(s) Ševčíková, J. (CZ)
Bártková, Denisa (UFM-A)
Goldbergová, M. (CZ)
Kuběnová, Monika (UFM-A)
Čermák, Jiří (UFM-A) RID, ORCID
Frenzel, J. (DE)
Weiser, Adam (UFM-A) ORCID
Dlouhý, Antonín (UFM-A) RID, ORCIDNumber of authors 8 Source Title Applied Surface Science. - : Elsevier - ISSN 0169-4332
Roč. 427, JAN (2018), s. 434-443Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords NiTi bio-compatibility ; Ni-ion release ; NiTi surface passivation ; Hydrogen soaking ; Scanning transmission electron microscopy Subject RIV JG - Metallurgy OECD category Materials engineering R&D Projects GA15-16336S GA ČR - Czech Science Foundation (CSF) Institutional support UFM-A - RVO:68081723 UT WOS 000415219100053 EID SCOPUS 85028989362 DOI 10.1016/j.apsusc.2017.08.235 Annotation The study is focused on Ni-ion release rates from NiTi surfaces exposed in the cell culture media and human vascular endothelial cell (HUVEC) culture environments. The NiTi surface layers situated in the depth of 70 µm below a NiTi oxide scale are affected
by interactions between the NiTi alloys and the bio-environments. The finding was proved with use of inductively coupled plasma mass spectrometry and electron microscopy experiments. As the exclusive factor controlling the Ni-ion release rates was not only thicknesses of the oxide scale, but also the passivation depth, which was two-fold larger. Our experimental data strongly suggested that some other factors, in addition to the Ni concentration in the oxide scale, admittedly hydrogen soaking deep below the oxide scale, must be taken into account in order to rationalize the concentrations of Ni-ions released into the bio-environments. The suggested role of hydrogen
as the surface passivation agent is also in line with the fact that the Ni-ion release rates considerably decrease in NiTi samples that were
annealed in controlled hydrogen atmospheres prior to bio-environmental exposures.
Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2019
Number of the records: 1