Abstract
| Lingua originale | English |
|---|---|
| Numero di pagine | 8 |
| Rivista | Electrochimica Acta |
| Volume | 54 |
| Stato di pubblicazione | Published - 2009 |
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All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Electrochemistry
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Photo-Electrochemical Investigation of Anodic Oxide Films on cast Ti-Mo Alloys. I. Anodic behaviour and effect of Alloy Composition. / Sunseri, Carmelo; Piazza, Salvatore; Guastaldi; Oliveira.
In: Electrochimica Acta, Vol. 54, 2009.Risultato della ricerca: Article
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TY - JOUR
T1 - Photo-Electrochemical Investigation of Anodic Oxide Films on cast Ti-Mo Alloys. I. Anodic behaviour and effect of Alloy Composition
AU - Sunseri, Carmelo
AU - Piazza, Salvatore
AU - Guastaldi, null
AU - Oliveira, null
PY - 2009
Y1 - 2009
N2 - The anodic behaviour of cast Ti–Mo alloys, having different Mo contents (6–20 wt.%), was investigatedin acidic and neutral aerated aqueous solutions. All sample showed a valve-metal behaviour, owing toformation and thickening of barrier-type anodic oxides displaying interference colours. Growth kineticsof passive films is influenced by both anodizing electrolyte and composition of the starting alloy. Thislast parameter was found to change also the solid-state properties of the films, explored by photoelectrochemicaland impedance spectroscopy experiments. Thicker films (Uf = 8 V/MSE) grown on alloys richer inMo showed more resistive character and a photocurrent sign inversion under negative bias, that revealedan insulating character, whereas corresponding films grown on alloys with lower Mo content, as well asthinner films, behaved as n-type semiconductors. Results are discussed in terms of formation of a mixedTi–Mo oxide phase.
AB - The anodic behaviour of cast Ti–Mo alloys, having different Mo contents (6–20 wt.%), was investigatedin acidic and neutral aerated aqueous solutions. All sample showed a valve-metal behaviour, owing toformation and thickening of barrier-type anodic oxides displaying interference colours. Growth kineticsof passive films is influenced by both anodizing electrolyte and composition of the starting alloy. Thislast parameter was found to change also the solid-state properties of the films, explored by photoelectrochemicaland impedance spectroscopy experiments. Thicker films (Uf = 8 V/MSE) grown on alloys richer inMo showed more resistive character and a photocurrent sign inversion under negative bias, that revealedan insulating character, whereas corresponding films grown on alloys with lower Mo content, as well asthinner films, behaved as n-type semiconductors. Results are discussed in terms of formation of a mixedTi–Mo oxide phase.
KW - Anodic films
KW - Molybdenum
KW - Photocurrent spectroscopy
KW - Titanium alloys
UR - http://hdl.handle.net/10447/61398
M3 - Article
VL - 54
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
ER -