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High Temperature Material Processes (An International Quarterly of High-Technology Plasma Processes)

An International Journal

ISSN for PRINT: 1093-3611

Institutional price:	$604.00
Issues per year:	4

Best Paper Award Selection - Editorial Board Site

2000, Volume4

152 pages

Issue price - $144.00

CONTACT ANGLE AND SURFACE TENSION MEASUREMENTS ON A METAL DROP BY IMAGE PROCESSING AND NUMERICAL CALCULATION

V. Leroux
L.M.C.T.S. - C.N.R.S. E.S.A. 6015 Universite de Limoges -123, av. Albert Thomas - 87065 LIMOGES Cedex

J. C. Labbe
Faculte des Sciences et Techniques, L.M.C.T.S. - C.N.R.S. E.S.A. 6015 Universite de Limoges -123, av. Albert Thomas - 87065 LIMOGES Cedex, France

M.E.R. Shanahan
Universite d'Evry-Val d'Essonne - Centre des Materiaux P.M. Fourt - E.N.S.M.P. BP 87 - 91003 EVRY Cedex

D. Tetard
L.M.C.T.S. - C.N.R.S. E.S.A. 6015 Universite de Limoges -123, av. Albert Thomas - 87065 LIMOGES Cedex

J.F. Goujaud
L.M.C.T.S. - C.N.R.S. E.S.A. 6015 Universite de Limoges -123, av. Albert Thomas - 87065 LIMOGES Cedex

ABSTRACT

The purpose of this work is to establish solid/liquid contact parameters : contact angle, surface tension and work of adhesion, for drops of molten metal on ceramic substrates. Referring to the literature, we can justify the use of the sessile drop method. After a judicious choice of the quantity of liquid for each drop, we have improved the performance of the measurement device. First, we have improved the definition of the drop picture. Then, we have rationalised the programs of exploitation of drop profiles for the calculation of the contact angle and the surface tension. Tests operated in various conditions such as high temperature show that the accuracy of the contact angle measurement is about one degree. This corresponds to a relative error of about 5 to 8 % on the work of adhesion when contact angle is around 150°.