Dependence of supercooling of a liquid on its overheating

Abstract

The nucleation process and the roles of structure and density fluctuations in supercooled liquid Fe Nucleation energetics during homogeneous solidification in elemental metallic liquids J. Appl. Phys.Heat capacity of tetrahydrofuran clathrate hydrate and of its components, and the clathrate formation from supercooled melt

Crystallization of Supercooled Liquid Elements Induced by Superclusters Containing Magic Atom Numbers

“…It has been found that a minimum superheating temperature of 40 K is required in order to achieve any undercooling prior to crystallization nucleation. This phenomenon is also observed in many magnetic texturing experiments [65]. In Table 3, the first Cu supercluster to be melted at θ = 0.033 in 600 s, corresponding to a superheating of 44.7 K, contains 13 atoms in perfect agreement with the observation.…”

Can elemental bismuth be a liquid crystal?

“…The findings of Goetz and his contemporaries appear to be related to a striking effect reported in modern calorimetric studies of resolidification of bismuth after heating slightly above melting [25,26]. These studies have not noted the possibility of such a relation, and have accordingly made no attempt to monitor crystal orientations.…”

“…Thus, the orientational effects observed by Goetz can be expected only in samples exhibiting "equilibrium" resolidification. It should be noted that the studies quoted make conflicting claims regarding the reported transition: Aleksandrov and coworkers [25] report a sharp "phase transition" between "equilibrium" and "explosive" behaviors, regardless of heating and cooling rates (although the temperature associated with this transition differs between the earlier and the later publications); Tong and Shi [26] report a transient effect, with only "explosive" resolidification observed if the sample is held at temperatures above melting for an extended time. Clearly, some of the relevant parameters are not under sufficient experimental control to achieve reproducibility of the phenomena.…”

Dependence of Liquid Supercooling on Liquid Overheating Levels of Al Small Particles

“…The thermal history effect can be quantified by the relationship between liquid overheating (Δ T + ), which is measured by the difference between liquid temperature and the equilibrium melting point ( T 0 ), and liquid supercooling (Δ T − ), which is measured by the difference between T 0 and the temperature of solidification. Thus far, the dependence of Δ T − on Δ T + has been investigated in metals/semimetals (Bi, Sn, Ga) [2,3,4,5,11,14] and alloys [6,7,8,9,10,11]; typically Δ T − increases with an increase of Δ T + up to several to tens of degrees above T 0 . Despite the fundamental and technical importance, the underlying mechanism of this phenomenon in relation to the liquid structure and the kinetics of heterogeneous nucleation of solidification is not well understood.…”

“…The cavity theory has been quantitatively validated by various experimental results [2,3,4,5], but it was considered to be not general, e.g., the dependence of Δ T − on Δ T + in Bi, Sn, SnSb and SnPb was found to be either continuous or discontinuous [10,11], which points to the evolution of transient short range order structures in the liquid state. Obviously, more investigations of the Δ T + -Δ T − relationship (thermal history effect) in metals and alloys are needed.…”