On the competition between interface energy and temperature in phase transition phenomena

Applications in Engineering Science

Stefano Giordano¹  Giuseppe Puglisi²  Luca Bellino³  Giuseppe Florio³ 

[1]INFN, Sezione di Bari, I-70126, Italy

[2]Institute of Electronics, Microelectronics and Nanotechnology – UMR 8520, University of Lille, CNRS, Centrale Lille, ISEN, University of Valenciennes, LIA LICS/LEMAC, Lille F-59000, France

[3]Politecnico di Bari, (DMMM) Dipartimento di Meccanica, Matematica e Management, Via Re David 200, Bari I-70125, Italy

关键词: Phase transition;    Interfacial energy;    Non local interactions;    Size dependence;    Temperature dependence;   

DOI  :  

来源: DOAJ

【 摘 要 】

Phase nucleation and propagation phenomena can be characterized by a cooperative behavior regulated by non local interactions between the multistable domains and with the loading device. Cooperativity is often macroscopically witnessed by a stress-peak, distinguishing the nucleation from the propagation stress, and by a larger size of the first nucleated domain. When low dimensional scales are considered, both in nanostructures or single molecule behaviors, the interfacial energy can compete with entropic effects, leading to the experimental observation of a temperature dependent phase transition strategy. We propose a fully analytical model, in the framework of equilibrium Statistical Mechanics, measuring such energetic competition and temperature dependent behavior, that well reproduces important experimental evidences. The effectiveness of the model is successfully tested in predicting the temperature dependent phase transition behavior of shape memory nanowires.

【 授权许可】

Unknown