SIMULATING THE EFFECT OF POISSON RATIO ON METALLIC GLASS PROPERTIES

Autor:	V. A. Levashov, James R. Morris, Takeshi Egami, Rachel S Aga
Rok vydání:	2009
Předmět:	Work (thermodynamics) Bulk modulus Materials science Amorphous metal Thermodynamics Statistical and Nonlinear Physics Condensed Matter Physics Poisson's ratio Condensed Matter::Soft Condensed Matter Crystal symbols.namesake Lattice constant Phase (matter) symbols Glass transition
Zdroj:	International Journal of Modern Physics B. 23:1229-1234
ISSN:	1793-6578 0217-9792
DOI:	10.1142/s0217979209060737
Popis:	Recent work has shown that many metallic glass properties correlate with the Poisson ratio of the glass. We have developed a new model for simulating the atomistic behavior of liquids and glasses that allows us to change the Poisson ratio, while keeping the crystalline phase cohesive energy, lattice constant, and bulk modulus fixed. A number of liquid and glass properties are shown to be directly affected by the Poisson ratio. An increasing Poisson ratio stabilizes the liquid structure relative to the crystal phase, as indicated by a significantly lower melting temperature and by a lower enthalpy of the liquid phase. The liquids clearly exhibit two changes in behavior: one at low temperatures, associated with the conventional glass transition Tg, and a second, higher temperature change associated with the shear properties of the liquids. This second crossover has a characteristic, measurable change in the liquid structure.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f7024e8a70d0a5edcb09a46420f60d3a https://doi.org/10.1142/s0217979209060737 Zobrazit plný text záznamu