J 2018

On the Ni-Ion release rate from surfaces of binary NiTi shape memory alloys

ŠEVČÍKOVÁ, Jana, Denisa BÁRTKOVÁ, Monika PÁVKOVÁ GOLDBERGOVÁ, Monika KUBĚNOVÁ, JIří ČERMÁK et. al.

Basic information

Original name

On the Ni-Ion release rate from surfaces of binary NiTi shape memory alloys

Authors

ŠEVČÍKOVÁ, Jana (203 Czech Republic, belonging to the institution), Denisa BÁRTKOVÁ (203 Czech Republic), Monika PÁVKOVÁ GOLDBERGOVÁ (203 Czech Republic, guarantor, belonging to the institution), Monika KUBĚNOVÁ (203 Czech Republic), JIří ČERMÁK (203 Czech Republic), Jan FRENZEL (203 Czech Republic), Adam WEISER (203 Czech Republic) and Antonín DLOUHÝ (203 Czech Republic)

Edition

Applied Surface Science, Amsterdam, Elsevier Science BV. 2018, 0169-4332

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

30105 Physiology

Country of publisher

Netherlands

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 5.155

RIV identification code

RIV/00216224:14110/18:00100744

Organization unit

Faculty of Medicine

UT WoS

000415219100053

Keywords in English

Hydrogen soaking; Ni-ion release; NiTi bio-compatibility; NiTi surface passivation; Scanning transmission electron microscopy

Tags

International impact, Reviewed
Změněno: 10/2/2019 17:06, Soňa Böhmová

Abstract

V originále

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 um 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.

Links

GA15-16336S, research and development project
Name: Intersticiální příměsi v tvarově-paměťových slitinách na bázi NiTi
Investor: Czech Science Foundation