Influence of Oxygen Partial Pressure and Oxygen Content on the Wettability in the Copper-Oxygen-Alumina System

The influence of oxygen on the wetting behavior of copper on single‐crystal Al2O3 has been studied. By controlling the oxygen partial pressure (pO2) and oxygen content in the copper simultaneously, contact angle can be varied between 125° and 22°. Evaluation of the Gibbs adsorption equation for the...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 1999-10, Vol.82 (10), p.2825-2832
Main Authors: Diemer, Matthias, Neubrand, Achim, Trumble, Kevin P., Rödel, Jürgen
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Miscellaneous
Physics
Solid-fluid interfaces
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
Technical ceramics
Wetting
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Summary:The influence of oxygen on the wetting behavior of copper on single‐crystal Al2O3 has been studied. By controlling the oxygen partial pressure (pO2) and oxygen content in the copper simultaneously, contact angle can be varied between 125° and 22°. Evaluation of the Gibbs adsorption equation for the liquid/solid interface at 1300°C suggests that adsorption of a Cu‐O complex at that interface plays a key role in promoting wetting. Formation of CuAlO2 and dissolution of Al2O3 in the melt also influence the contact angle, especially in the range of pO2 > 10−5 bar (1 Pa).
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1999.tb02163.x