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Density and Structure of Liquid Si-M (M=Fe, Ni, and Ge) Alloys

Published online by Cambridge University Press:  14 March 2013

Akitoshi Mizuno ,
Kentaro Murai ,
Hiroya Kawauchi ,
Mitsuhiro Tannno ,
Shinji Kohara  and
Masahito Watanabe
Akitoshi Mizuno
Affiliation:
Department of Physics, Gakushuin University, Mejiro, Tokyo 171-8588, Japan
Kentaro Murai
Affiliation:
Department of Physics, Gakushuin University, Mejiro, Tokyo 171-8588, Japan
Hiroya Kawauchi
Affiliation:
Department of Physics, Gakushuin University, Mejiro, Tokyo 171-8588, Japan
Mitsuhiro Tannno
Affiliation:
Department of Physics, Gakushuin University, Mejiro, Tokyo 171-8588, Japan
Shinji Kohara
Affiliation:
Research and Utilization Division, Japan Synchrotron Radiation Research Institute/SPring-8, Kouto, Hyogo 679-5198, Japan
Masahito Watanabe
Affiliation:
Department of Physics, Gakushuin University, Mejiro, Tokyo 171-8588, Japan
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Abstract

In order to elucidate a link between density and structure of liquid Si-M (M=Fe, Ni, and Ge) alloys, synchrotron x-ray diffraction experiments have been conducted with the use of a conical nozzle levitation technique. Liquid structure factors of the Si-Fe and the Si-Ni alloys indicate a correlation of medium range ordering with the increase of the Si content. Although the total molar volume expands with the increase of the Si content in these alloys, the concentration dependence of the average interatomic distance shows a minimum around 70 at.% Si content. On the other hand, the Si-Ge alloys shows tendency of concentration dependence as ideal mixture in both total molar volume and the average interatomic distance. These results were discussed taking into account the formation of anisotropic bonds between 3d transition metal and Si atoms, which may induce a spatial expansion in the microscopic scale.

Keywords

x-ray diffraction (XRD)liquidSi
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1528: Symposium VV – Advanced Materials Exploration with Neutrons and Synchrotron X-Rays , 2013 , mrsf12-1528-vv10-05
Copyright
Copyright © Materials Research Society 2013

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