THE WETTABILITY OF SOLIDS IRON AND COPPER BY LIQUIDS STANNUM, PLUMBUM AND CALCULATION INTERFACIAL ENERGIES

Abstract

Object. Until recently, due to the absence of many solid metal experimental values of the surface energy sSV and the temperature coeffi cient Ds D SV / T not possible to bring the computed values of interfacial energy sSL of the same temperature at which measurements were made of the contact angle, which naturally negatively infl uence in the results of calculations of interfacial energies. At the present time by their calculation them will be able to account the temperature factor for many solid-liquid metal systems. Purpose. The purpose of this paper is calculating interfacial energy between melting metal and another solid metal. The interfacial energy of iron, copper on the boundary with meltings stannum, plumbum is calculated. It is showed that if the wetting angles more than ninety degrees, it then the interfacial energy is more than surface energy of a solid body. In case, when boundary angle is smaller ninety degrees then the interfacial energy less than the surface energy of solid body. Method and Methodology. According to the literature, data know experimental values of contact angles formed by liquid tin, lead on the surfaces of solid iron, and copper their interfacial energy calculated. For calculations, we used the Young’s equation relating interfacial energy with the surface energies of the solid, the liquid and the cosine of the contact angle. Results. It is showed that if the take in to account the temperature at which it the makes a signifi cant is measured, contributes to the of a signifi cant contribution in the interfacial energy. Conclusions. In conclusion, it should be noted that our method of calculation can be also adapted to the investigations of other solid-melt system.

Keywords

• boundary angle
• surface energy
• interfacial energy
• stannum
• plumbum
• iron
• copper.