Untitled

Abstract

The melting behaviour of Pb film embedded in an Al matrix has been investigated by a molecular dynamics simulation technique. The Sutton-Chen potential for alloys has been employed to perform these calculations. Melting of a Pb(110) film has been studied by embedding it in Al(110) and Al(111). Melting is found to initiate at the film-host interface for the Al(110) host. However, a change in orientation of the film is observed before superheating when the film is embedded in the Al(111) matrix. The superheating determined by simulation is comparable with the value calculated by homogeneous theory.

The Uptake of Acidic Gases on Ice

“…Similar observations have been made for aluminum. , In case of lead, facets not showing any surface melting can be overheated by up to 120 °C above the metals' melting temperature . Such effects have been corroborated in molecular dynamics studies …”

“…100 Such effects have been corroborated in molecular dynamics studies. 101 Based on these results, surface melting can be considered as germ formation for the nucleation of the phase transition from the solid to the liquid state. Thus, surface disorder is responsible for the asymmetry that liquids, such as water, tend to supercool massively before the solid nucleates, whereas the solid cannot "superheat" in the presence of surface disorder.…”

Effect of grain size on the melting point of confined thin aluminum films

“…Melting nucleation is suppressed and a superheating effect can be observed when the interface between the interlayer and matrix is coherent. 38,61,69 In the opposite case, when the interface is disordered and the energy of the interface is high, …”

“…MD was successfully applied to examine the effects of size on the melting behavior of metallic nanoparticles, 62 nanowires 63-66 and thin films 67,68 36,69,70 Simulations were also performed for bulk nanocrystalline metals. 71 In these studies, the melting of nanocrystalline thin aluminum interlayers with average grain size varying from 4 to 35 nm was studied.…”

Thermal stability, atomic vibrational dynamics, and superheating of confined interfacial Sn layers inSn∕Simultilayers

“…A larger enhancement of up to 300 K was calculated by Akhter et al for a Pd͑110͒ film in an Al͑111͒ host. 8 The ͑110͒-to-͑111͒ reorientation of the Pb film embedded in the Al͑111͒ matrix was held responsible for this effect. Thus, melting temperatures obtained from diffraction studies on systems susceptible to reorientation near melting might not be reliable.…”