Melting of superheated crystals initiates on vacancies

Autor:	Wang, L. W., Wang, Q., Lu, K. Q.
Rok vydání:	2010
Předmět:	Condensed Matter - Materials Science Condensed Matter - Soft Condensed Matter
Zdroj:	Philosophical Magazine Letters, vol 87, pp19-25, 2007
Druh dokumentu:	Working Paper
DOI:	10.1080/09500830601059641
Popis:	In a large variety of ideal crystals we found that when rapidly migrating atoms squash or annihilate a neighbouring vacancy and produce a disordered cluster, the heat of migration stored in the system exceeds the enthalpy increase required for the coordinating atoms of the vacancy to form a liquid phase, i.e. the liquid phase nucleates from vacancies. Furthermore volumetric analysis supports this well. This vacancy-decomposition model provides quantitative information on the melting point, the latent heat and the volume change upon melting and hence clarifies the mechanism of melting. Comment: 8pages,3figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1007.4258 Zobrazit plný text záznamu View this record from Arxiv