NiTi shape-memory alloy oxidized in low-temperature plasma with carbon coating: Characteristic and a potential for cardiovascular applications
PBN-AR
Instytucja
Wydział Inżynierii Materiałowej (Politechnika Warszawska)
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Applied Surface Science (35pkt w roku publikacji)
ISSN
0169-4332
EISSN
Wydawca
Elsevier BV - North-Holland
DOI
Rok publikacji
2017
Numer zeszytu
Strony od-do
89-96
Numer tomu
421
Identyfikator DOI
Liczba arkuszy
0.5
Autorzy
Pozostali autorzy
+ 2
Słowa kluczowe
en
Nitinol
Glow discharge oxidizing
RFCVD process
Corrosion resistance
Hemocompatibility
Streszczenia
Język
en
Treść
Surface layers currently produced on NiTi alloys do not meet all the requirements for materials intended for use in cardiology. Plasma surface treatments of titanium and its alloys under glow discharge conditions make it possible to produce surface layers, such as TiN or TiO2, which increases corrosion resistance and biocompatibility. The production of layers on NiTi alloys with the same properties, and maintaining their shape memory and superelasticity features, requires the use of low-temperature processes. At the same time, since it is known that the carbon-based layers could prevent excessive adhesion and aggregation of platelets, we examined the composite a-CNH + TiO2 type surface layer produced by means of a hybrid method combining oxidation in low-temperature plasma and Radio Frequency Chemical Vapor Deposition (RFCVD) processes. Investigations have shown that this composite layer increases the corrosion resistance of the material, and both the low degree of roughness and the chemical composition of the surface produced lead to decreased platelet adhesion and aggregation and proper endothelialization, which could extend the range of applications of NiTi shape memory alloys.
Inne
System-identifier
WUTe24d5749bd044f9889f62344f99678b1
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