Special Case of the Dimensional Dependence of the Contact Melting Temperature

Abstract

AbstractFor the first time, the limiting mass sizes (simultaneous changes in size and mass) are introduced, which determine the initial stage of contact melting (CM) both between bulk samples and nanoscale samples at the corresponding eutectic temperatures. Possible variants of the CM manifestation are analyzed depending on the ratio of the introduced limiting mass sizes of nanoobjects, i.e. the upper and lower limits of the eutectic CM have been introduced. The introduction of critical dimensions made it possible to state that these are those thicknesses whose dimensions for a given eutectic system are sufficient for the formation of a eutectic ratio of components both in the case of CM of massive samples and of CM nanoobjects at a temperature slightly higher than Teut. The paper also discusses a possible mechanism for the initial stage of the CM and proposes a method for determining the temperatures of the beginning and end of melting of thin films depending on their thickness. The existence of limiting minimum mass sizes of nanoobjects required for the formation of a transition layer with a eutectic ratio of components (eutectic CM), both between bulk samples and between nanoscale samples, is shown.KeywordsContact meltingMass dimensionsEutectic temperatureThin filmsNanoobjects