Existence of Local Network Structure in Binary Amorphous Metals and its Contribution to Elastic Properties

Abstract:

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The paper focuses on the characteristic local network structure of icosahedra observed in the relaxed amorphous metals and its contribution to their elastic properties. Using molecular dynamics method, CuxZr100-x binary amorphous models are constructed by rapidly quenching process from liquid. Voronoi polyhedron analyses expose the existence of the medium-range local network structure composed of inter-penetrating icosahedra. It is found that the globally averaged shear modulus obtained from the atomistically defined elastic moduli decreases with increasing free volume content in the condensed matter. The contribution of the densely packed icosahedral cluster with higher elastic rigidity to the global elastic modulus is discussed.

Info:

Periodical:

Advanced Materials Research (Volumes 89-91)

Edited by:

T. Chandra, N. Wanderka, W. Reimers , M. Ionescu

Pages:

604-608

DOI:

10.4028/www.scientific.net/AMR.89-91.604

Citation:

M. Wakeda and Y. Shibutani, "Existence of Local Network Structure in Binary Amorphous Metals and its Contribution to Elastic Properties", Advanced Materials Research, Vols. 89-91, pp. 604-608, 2010

Online since:

January 2010

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$35.00

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