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Influence of annealing on the structure of nanoporous oxide films on the surface of titanium‒aluminum powder alloy
Petrozavodsk State University, Petrozavodsk, Russia. (Theoretical physics department)
Petrozavodsk State University, Petrozavodsk, Russia. (Theoretical physics department)
Petrozavodsk State University, Petrozavodsk, Russia. (Theoretical physics department)
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), MPE-lab. (Nanovetenskap)
2016 (English)In: Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques, ISSN 1027-4510, Vol. 10, no 5, 933-941 p.Article in journal (Refereed) Published
Abstract [en]

Oxide films obtained during anodization of Ti‒40% Al sintered powder samples in fluorine-containing electrolytes are investigated. With scanning electron microscopy and X-ray phase analysis, it is demonstrated that an X-ray amorphous nanoporous anodic oxide film is formed on the surface of the powder microparticles under optimal anodization conditions. After annealing at T = 1093 K in air and vacuum (10‒2 Pa), the oxide films are revealed to crystallize with its regular porous structure retained. The composition of the polycrystalline anodic-oxide films annealed in air is a mixture involving TiO2 (anatase and rutile) and α- and γ-Al2O3 phases and Ti2O3 and Al2TiO5 traces. The vacuum annealing process makes it possible to identify TiO2, in which anatase is the main phase, α- and γ-Al2O3, and Ti2O3 and TiO traces. However, rutile is not revealed. The presented results indicate that the application of the anodic nanostructuring of Ti‒40% Al powders is promising for the obtainment of new photocatalytic active nanomaterials. © 2016, Pleiades Publishing, Ltd.

Place, publisher, year, edition, pages
Moscow: Maik Nauka/Interperiodica, 2016. Vol. 10, no 5, 933-941 p.
Keyword [en]
anodization, nanoporous oxide films, titanium‒aluminum powder, alloy, annealing, crystallization
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:hh:diva-32919DOI: 10.1134/S102745101605013XISI: 000389149000007Scopus ID: 2-s2.0-84991824708OAI: oai:DiVA.org:hh-32919DiVA: diva2:1061963
Available from: 2017-01-04 Created: 2017-01-04 Last updated: 2017-01-09Bibliographically approved

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