Number of the records: 1

Atomic layer-deposited Al.sub.2./sub.O.sub.3./sub. coatings on NiTi alloy

SYSNO ASEP	0432497
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Atomic layer-deposited Al₂O₃ coatings on NiTi alloy
Author(s)	Kei, C.C. (TW) Yu, Y.S. (TW) Racek, Jan (FZU-D)_{RID, ORCID} Vokoun, David (FZU-D)_{RID, ORCID} Šittner, Petr (FZU-D)_{RID, ORCID}
Source Title	Journal of Materials Engineering and Performance. - : Springer - ISSN 1059-9495 Roč. 23, č. 7 (2014), s. 2641-2649
Number of pages	9 s.
Action	International Conference on Shape Memory and Superelastic Technologies (SMST 2013)
Event date	21.05.2013-24.05.2013
VEvent location	Praha
Country	CZ - Czech Republic
Event type	WRD
Language	eng - English
Country	US - United States
Keywords	ALD ; Al₂O₃ coating ; corrosion ; NiTi
Subject RIV	BM - Solid Matter Physics ; Magnetism
R&D Projects	GA101/09/0702 GA ČR - Czech Science Foundation (CSF)
	7E11058 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	FZU-D - RVO:68378271
UT WOS	000339010700052
EID SCOPUS	84904795412
DOI	10.1007/s11665-014-0956-1
Annotation	Atomic layer deposition is introduced as a method suitable for preparation of Al2O3 layers on the surface of NiTi medical devices such as stents because of the excellent thickness control and conformal protective coating on complex structures. The corrosion properties of NiTi plates with Al2O3 coatings of various thicknesses in an environment similar to that occurring in the human body were studied using open circuit potential, potentiostatic electrochemical impedance spectroscopy, and cyclic polarization tests. It shows that the layer thickness plays a key role in the inhibition of corrosion. The thinner layers are more diffuse and make it easier for anodic reaction of passive NiTi with protective TiO2 underneath of Al2O3, while the thicker layers have the barrier effect with local pores initiating pitting corrosion. The results of our electrochemical experiments consistently show that corrosion properties of thick Al2O3 coatings on NiTi plate are inferior compared to the thin layers.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2015

Number of the records: 1