Characterisation of Surface Oxidation of Nickel-Titanium Alloy by Ion-beam and Electrochemical Techniques (Articolo in rivista)

Type
Label
  • Characterisation of Surface Oxidation of Nickel-Titanium Alloy by Ion-beam and Electrochemical Techniques (Articolo in rivista) (literal)
Anno
  • 2004-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.electacta.2004.07.007 (literal)
Alternative label
  • Barison S.; Cattarin S.; Daolio S.; Musiani M.; Tuissi A. (2004)
    Characterisation of Surface Oxidation of Nickel-Titanium Alloy by Ion-beam and Electrochemical Techniques
    in Electrochimica acta
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Barison S.; Cattarin S.; Daolio S.; Musiani M.; Tuissi A. (literal)
Pagina inizio
  • 11 (literal)
Pagina fine
  • 18 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.sciencedirect.com/science/article/pii/S0013468604007972 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 50 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1-4 : Istituto per l'Energetica e le interfasi IENI CNR, Corso Stati Uniti, 4 35127 Padova 5 : IENI CNR Lecco (literal)
Titolo
  • Characterisation of Surface Oxidation of Nickel-Titanium Alloy by Ion-beam and Electrochemical Techniques (literal)
Abstract
  • The passivating effects produced on Ni49Ti51 (at.%) shape memory alloy by electropolishing in methanol-sulphuric acid electrolyte or thermal treatment in air are investigated with ion-beam techniques (secondary ion mass spectrometry (SIMS) and mass resolved ion scattering spectrometry (MARISS)) and electrochemical techniques (polarisation curves, photocurrent spectroscopy and impedance). Electropolishing produces a limited passivation due to formation of a thin layer of amorphous TiO2, which causes only a slight hindrance to the oxygen evolution reaction. Thermal treatment in air at 450degreesC causes a more substantial passivation due to formation of a thick oxide layer, estimated at about 80 nm for a 16 h treatment on the basis of weight increase, disregarding roughness. Data indicate that the film produced by thermal oxidation has probably a duplex structure, with a porous outer layer with inclusions of Ni species and a compact inner layer, in contact with the substrate, consisting of (essentially) nickel free TiO2 rutile. (literal)
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