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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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de Oliveira, M. F. [1] ; Almyras, G. A. [2] ; Evangelakis, G. A. [2]
Total Authors: 3
[1] Univ Sao Paulo, Sao Carlos Sch Engn, BR-13566590 Sao Carlos, SP - Brazil
[2] Univ Ioannina, Dept Phys, GR-45110 Ioannina - Greece
Total Affiliations: 2
Document type: Journal article
Source: COMPUTATIONAL MATERIALS SCIENCE; v. 104, p. 92-97, JUN 15 2015.
Web of Science Citations: 3

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 initial systems to the same amorphous structure at 300 K. Such a structure, however, is composed of less ordered clusters, i.e. less icosahedral-like clusters in comparison with the same amorphous alloy produced by rapid quenching from the melt. After a short time annealing at 800 K the less ordered structure evolves towards the structure of the rapidly solidified sample. From these results it comes out that no structural differences are to be expected in metallic glasses produced by mechanical alloying and by rapid quenching; any differences found in metallic glasses produced by these two different routes should be attributed to insufficient alloying treatment during the mechanical alloying procedure. (C) 2015 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/17117-2 - Searching for new metallic glasses
Grantee:Marcelo Falcão de Oliveira
Support Opportunities: Regular Research Grants
FAPESP's process: 12/20888-3 - Solid solution strain simulations compared with a topological model for glass formation in metallic alloys
Grantee:Marcelo Falcão de Oliveira
Support Opportunities: Research Grants - Visiting Researcher Grant - International