Wettability and interfacial reactions in Al/TiO 2 | Zendy

Sobczak N. | Zendy; Stobierski L. | Zendy; Radziwill W. | Zendy; Ksiazek M. | Zendy; Warmuzek M. | Zendy

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Wettability and interfacial reactions in Al/TiO 2

Author(s) -

Sobczak N.,

Stobierski L.,

Radziwill W.,

Ksiazek M.,

Warmuzek M.

Publication year - 2004

Publication title -

surface and interface analysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.52

H-Index - 90

eISSN - 1096-9918

pISSN - 0142-2421

DOI - 10.1002/sia.1838

Subject(s) - sessile drop technique , wetting , contact angle , drop (telecommunication) , crystallite , oxide , chemical engineering , chemistry , characterization (materials science) , aluminium oxide , materials science , metallurgy , composite material , nanotechnology , mechanical engineering , engineering

The effects of temperature and testing procedure on the wetting properties of molten Al on polycrystalline TiO 2 substrates were studied by a sessile drop method in vacuum at 1173–1373 K. For the common contact heating procedure, oxidized molten Al wets titania at T > 1210 K. The removal of the oxide film from the Al drop by means of a capillary purification procedure makes the Al/TiO 2 couple wettable at 1173 K. The structure and chemistry characterization of Al/TiO 2 interfaces shows that molten Al reacts with TiO 2 to form fine alumina particles and Ti, which subsequently is dissolved in the Al drop. However, this reaction is remarkable at 1373 K only and much higher temperatures are required for successful reactive synthesis of Al/Al 2 O 3 composites. Copyright © 2004 John Wiley & Sons, Ltd.

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