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Wetting of Anorthite Liquid On m-Sapphire Substrates

Published online by Cambridge University Press:  02 July 2020

N. Ravishankar ,
S. Ramamurthy ,
H. Schmalzried  and
C. Barry Carter
N. Ravishankar
Affiliation:
Department of Chemical Engineering and Materials Science, University of Minnesota421 Washington Ave SE, Minneapolis, MN55455-01432
S. Ramamurthy
Affiliation:
Department of Chemical Engineering and Materials Science, University of Minnesota421 Washington Ave SE, Minneapolis, MN55455-01432
H. Schmalzried
Affiliation:
Department of Physical Chemistry, University of Hanover, Hanover, Germany
C. Barry Carter
Affiliation:
Department of Chemical Engineering and Materials Science, University of Minnesota421 Washington Ave SE, Minneapolis, MN55455-01432
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Extract

The equilibrium condition for a liquid droplet in contact with a smooth, homogeneous, isotropic, non-deformable surface is given by the celebrated Young-Dupre equation1. This equation is based on the balance of the horizontal forces acting on the droplet. The idealised assumptions involved in arriving at the equation are seldom met in real experiments. Recently, Saiz et al have discussed the case of ridging of the solid at the three phase boundary (solid-liquid-vapour boundary) as a requirement for a stable three-phase co-existence. The wetting of anorthite on. sapphire substrates of different orientations have been studied earlier. In the present study, the wetting of anorthite liquid on m-plane of sapphire has been studied. The m-plane of sapphire is known to reconstruct in to two sets of facets and thus provides an interesting opportunity to study the wetting of liquid on a nonsmooth surface which contains linear patches with different surface energies.

Type
Future of Microscopy: Ceramics, Composites, and Cement
Information
Microscopy and Microanalysis , Volume 5 , Issue S2: Proceedings: Microscopy & Microanalysis '99, Microscopy Society of America 57th Annual Meeting, Microbeam Analysis Society 33rd Annual Meeting, Portland, Oregon August 1-5, 1999 , August 1999 , pp. 812 - 813
Copyright
Copyright © Microscopy Society of America

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References

1. Young, T., Phil. Trans. R. Soc. 95 (1805) 65Google Scholar

2. Saiz, E., Tomsia, A.P. and Canon, R.M., Acta Mater. 46(7) (1998) 2349CrossRefGoogle Scholar

3. Ramamurthy, S., Schmalzreid, H. and Carter, C.B. (to be published)Google Scholar