Výsledky vyhledávání - "G.A. Almyras"

Structural differences of amorphous Cu65Zr35 between rapidly quenched and topologically destabilized crystalline Cu and Zr metals by molecular dynamics simulations

Autor: G.A. Almyras, G.A. Evangelakis, M.F. de Oliveira

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

In this work we demonstrate, by means of molecular dynamic simulations, that the topological instability caused by successive substitutions of Zr in the Cu lattice, or Cu in the Zr lattice towards a final alloy composition of Cu65Zr35, transform the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6e40903897b95ec3b225c5b7bc956b1
https://doi.org/10.1016/j.commatsci.2015.03.041

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On the role of Icosahedral-like clusters in the solidification and the mechanical response of Cu–Zr metallic glasses by Molecular Dynamics simulations and Density Functional Theory computations

Autor: G.A. Evangelakis, G.B. Bokas, D.G. Papageorgiou, Ch.E. Lekka, A.E. Lagogianni, G.A. Almyras

Publikováno v: Intermetallics. 43:138-141

Cu–Zr Metallic glasses (MG) are considered to be composed of Icosahedral-like (ICO) clusters that may be distorted, truncated and/or interconnected. Aiming in gaining insight on the role of these units in the solidification-glass formation processe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2b3c5dd1ee1452cc004614bdcec1269f
https://doi.org/10.1016/j.intermet.2013.07.022

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Clustering, microalloying and mechanical properties in Cu/Zr-based glassy models by molecular dynamics simulations and ab-initio computations

Autor: G.A. Evangelakis, Ch.E. Lekka, G.A. Almyras, G.B. Bokas, D.G. Papageorgiou

Publikováno v: Journal of Alloys and Compounds. 536:S65-S69

We present results on the microstructure of Cu-Zr metallic glasses (MGs) at equilibrium and under tensile deformation by means of large scale molecular dynamics (MD) simulations and density functional theory (DFT) calculations. We found that the MGs

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f376fb88c3c985f77913c5714860a16d
https://doi.org/10.1016/j.jallcom.2011.11.038

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Atomic cluster arrangements in Reverse Monte Carlo and Molecular Dynamics structural models of binary Cu–Zr Metallic Glasses

Autor: D.G. Papageorgiou, Ch.E. Lekka, G.A. Evangelakis, G.A. Almyras, Jürgen Eckert, Norbert Mattern

Publikováno v: Intermetallics. 19:657-661

We report on results concerning the short-range order of Cu35Zr65, Cu50Zr50 and Cu65Zr35 Metallic Glasses (MG) by means of Reverse Monte Carlo (RMC) (based on Neutron scattering data) and Molecular Dynamics simulations (MD). For each one of these MGs

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ad1ab5675aee3650e3f08944e593ff78
https://doi.org/10.1016/j.intermet.2011.01.001

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On the microstructure of the Cu65Zr35 and Cu35Zr65 metallic glasses

Autor: G.A. Almyras, Norbert Mattern, Ch.E. Lekka, G.A. Evangelakis

Publikováno v: Scripta Materialia. 62:33-36

We report on the microstructure of Cu(65)Zr(35) and Cu(35)Zr(65) metallic glasses (MGs). We found that the systems consist of small touching and/or interpenetrating icosahedral-like clusters that obey a simple rule, which is dictated from the system'

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07c72c82d6496993d90c20570294a303
https://doi.org/10.1016/j.scriptamat.2009.09.019

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Structural characteristics of CuxZr100−x metallic glasses by Molecular Dynamics Simulations

Autor: G.A. Almyras, A.E. Lagogianni, G.A. Evangelakis, D.G. Papageorgiou, Ch.E. Lekka

Publikováno v: Journal of Alloys and Compounds. 483:658-661

We present Molecular Dynamics Simulations results on the micro-structural characteristics of the CuxZr100 − x metallic glasses. In all stoichiometries studied, we found that the Cu-centered small icosahedral clusters (ICO) are a basic structured ob

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ca3e4ef0d3230bd758cdcd739ab02e5
https://doi.org/10.1016/j.jallcom.2008.07.211

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Icosahedral order in Cu-Zr amorphous alloys studied by means of X-ray absorption fine structure and molecular dynamics simulations

Autor: J. Antonowicz, A. Pietnoczka, G.A. Evangelakis, D.G. Papageorgiou, Tomasz Drobiazg, G.A. Almyras

We have used the X-ray absorption fine structure method and molecular dynamics (MD) simulations to characterize atomic order in Cu-Zr metallic glasses (MGs). The microstructure of these MGs is described in terms of interconnected icosahedral-like clu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::623341bd1b34e0a8b475322c5f78a340
http://olympias.lib.uoi.gr/jspui/handle/123456789/14032

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On the deposition mechanisms and the formation of glassy Cu–Zr thin films

Autor: Ph. Komninou, G.A. Evangelakis, Grigorios Matenoglou, Panos Patsalas, Constantine Kosmidis, G.A. Almyras

Publikováno v: Journal of Applied Physics. 107:084313

We report on molecular dynamics (MD) simulations and physical vapor deposition experimental results concerning the development of glassy and nanocrystalline Cu–Zr thin films. MD has revealed that when Cu and Zr are deposited sequentially, a thin fi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::22ff08717f46eded41026bc19542bf5f
https://doi.org/10.1063/1.3366715

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