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A microstructural study of mechanical alloying of Fe and Sn powders

Published online by Cambridge University Press:  31 January 2011

Gérard Le Caër ,
Paolo Matteazzi  and
Brent Fultz
Gérard Le Caër
Affiliation:
Laboratoire de Science et Génie des Matériaux Métalliques associé au CNRS U.R.A. 159, Ecole des Mines, F-54042 Nancy Cedex, France
Paolo Matteazzi
Affiliation:
Istituto di Chimica, Università degli Studi di Udine, Via Cotonificio 108,1-33100 Udine, Italy
Brent Fultz
Affiliation:
Department of Materials Science, California Institute of Technology, Mail Stop 138-78, Pasadena, California 91125
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Abstract

Elemental Fe and Sn powders in the ratio of 1:2 were ball-milled for various times at room temperature, and phase transformations in the powders were studied by 57Fe and 119Sn Mössbauer spectrometries, transmission electron microscopy, and x-ray diffractometry. Although Fe-Sn alloys are not obvious candidates for solid-state amorphization reactions, an amorphous phase formed after only a few hours of ball milling. Nanocrystalline intermetallic FeSn2 particles nucleated and grew within the amorphous phase, and FeSn2 became the major phase after 10–20 h of ball milling. These small particles were superparamagnetic, and were above the blocking temperature at room temperature.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 6 , June 1992 , pp. 1387 - 1395
Copyright
Copyright © Materials Research Society 1992

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