Abstract:
The article reviews the existing methods for determining the surface energy of solids. Each of the methods described is practically limited to either temperature or values that are experimentally determined with low accuracy. A method is proposed for determining the surface energy of a solid on the basis of the dimensional dependence of its physical properties (magnetic permeability, luminescence intensity, thermal conductivity, etc.). The surface energy of alkaline halides is determined. Its magnitude is much larger than the surface energy of pure metals. The critical radius of these compounds is calculated, starting with which the direct Hall-Petch effect is reversed.
