Superheating and melting kinetics of confined thin films

Zhang, L.; Zhang, L. H.; Sui, M. L.; Tan, Jun; Lu, K.

doi:10.1016/j.actamat.2006.03.045

Cited by 30 publications

(26 citation statements)

References 26 publications

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“…The other possible factor for superheating of the nanoparticles is the suppression of melt growth. Even, if melt nucleates easily at the heterogeneous sites, the melt front [2] have developed a simple model based on thermodynamic analysis of the interfacial energy condition for the growth of liquid front. According to this model, the driving force for growth of melt front for epitaxially oriented interface basically originates from the positivefree energy changes owing to the solid to liquid transformation.…”

Section: B Melting Behavior Of Multilayersmentioning

confidence: 99%

“…There have been few reports in the literature on such strategies. [2,7] Lu et al have shown that it is possible to achieve even superheating in thin films with epitaxial interfaces by suppression of the melt growth during melting. [7] By confining Pb thin films in Al layers using repeated cold rolling of sandwiched Al/Pb/Al as well as magnetron sputtering, these authors have reported maximum superheating of 80 K (or 80°C) for 6 nm Pb layers sandwiched between Al layers.…”

Section: Introductionmentioning

confidence: 98%

“…Huge superheating is explained by suppression of the melt growth between the epitaxial layers during melting. [2,5] It has been suggested that the role of the epitaxial interfaces in case of Al/Pb/ Al multilayer thin film is mainly to suppress the melt growth. [1] The present investigation is primarily aimed to probe this effect on alloys.…”

Section: Introductionmentioning

confidence: 99%

“…As the thickness of the films deceases to nanometric scale, the underlying surfaces as well as interfacial area become too large. [2][3][4][5] Therefore, the thermal stability of such a low-dimensional system against phase transformation relative to their bulk counterpart is of critical concern. [6,7] The phase transformation behavior of thin films can effectively be understood by studying the melting and solidification behavior.…”

Section: Introductionmentioning

confidence: 99%

“…[4,13] Novel technological applications demand further reduction of the film thickness and thus make the thermal stability of these nanostructured material a major obstacle for potential usage. [2] Therefore, there is a need to devise novel strategies to improve thermal stability of the thin films. There have been few reports in the literature on such strategies.…”

Section: Introductionmentioning

confidence: 99%

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Melting Behavior of Al/Pb/Sn/Al Multilayered Thin Films

Khan

Devi

Biswas

2015

Metall Mater Trans A

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Metals or alloy nanoparticles (NPs) have been reported to exhibit superheating on melting when coated with higher melting point material or embedded in a matrix. This is due to the suppression of the heterogeneous nucleation of the melt at the epitaxial interface. For 2D thin films, this necessary condition is not feasible because even if a thin film is sandwiched between higher melting temperature materials with coherent interfaces, the heterogeneous nucleation of melt is possible at various detects. However, it has earlier been reported that 2D thin films of the pure metal sandwiched by other materials can exhibit superheating by suppression of melt growth. In order to probe this effect in case of alloy thin films, the present investigation has been carried out on Pb/Sn multilayers sandwiched between Al layers. The present study shows that such sandwiched thin films prepared by accumulative roll bonding process cause the formation of biphasic NPs in the intermixed region of Pb and Sn. Al layers undergo severe plastic deformation, leading to the generation of dislocations and sub-grain boundaries. DSC (differential canning calorimeter) thermograms of the films indicate superheating of 3 K to 6 K (or 3°C to 6°C). Theoretical analysis using currently available literatures has been carried out to justify the finding in the present investigation.

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Section: B Melting Behavior Of Multilayersmentioning

confidence: 99%