Improved wetting of Al2O3 by molten Sn with Ti addition at 973–1273 K

Wetting of polycrystalline Al2O3 by molten Sn-(2, 5 at.%) Ti alloys using modified sessile drop method under high vacuum at 973–1273 K was studied. Ti addition can improve wettability definitely without the precipitation of the continuous reaction layer. The wetting mechanism should be mainly ascrib...

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Bibliographic Details
Published in:Journal of alloys and compounds 2018-03, Vol.739, p.616-622
Main Authors: Sui, Ran, Ju, Chunyan, Zhong, Weiqiang, Lin, Qiaoli
Format: Article
Language:English
Subjects:
Adsorption
Interface
Reaction
Spreading
Wetting
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Summary:Wetting of polycrystalline Al2O3 by molten Sn-(2, 5 at.%) Ti alloys using modified sessile drop method under high vacuum at 973–1273 K was studied. Ti addition can improve wettability definitely without the precipitation of the continuous reaction layer. The wetting mechanism should be mainly ascribed to Ti adsorption that induced the decrease of liquid/solid interfacial free energy. The statistical thermodynamic model was used for the prediction of final contact angles and satisfied the experimental results. Spreading dynamics were controlled by the adsorption dynamics in the most of the range. The description of adsorption or reaction controlled spreading model has almost the same expression, but the activation energies of adsorption wetting are much smaller than that of reaction product controlled wetting. •Wettability of Sn-Ti/Al2O3 can be predicted by statistical thermodynamic model.•Adsorption can play a significant role on wettability in metal/ceramic system.•Adsorption wetting has a smaller activation energy comparing to reaction product controlled wetting.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2017.12.350