Surface Tension of Liquid High-Entropy Equiatomic Alloys of a Cu-Sn-Bi-In-Pb System

An experimental study of the temperature dependences of the surface tension of liquid highentropy equiatomic alloys of a Cu-Sn-Bi-In-Pb system is conducted. Measurements are made within the temperature range of t(L) to 1300 degrees C in the mode of heating and subsequent cooling of a sample. Overcooling of a melt prior to crystallization is detected. The depth of overcooling grows along with the number of components in the melt, while the temperature coefficient of surface tension falls. The experimental results qualitatively interpreted within the concepts of the specific surface entropy of a liquid.