RÉSUMÉ

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°.