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Time evolution of the structural short-range order during the mechanical milling of Fe–Co–Cu nanocrystalline alloys

Published online by Cambridge University Press:  31 January 2011

N. Gay-Sanz ,
C. Prieto ,
A. Muñoz-Martín ,
A. de Andrés ,
M. Vázquez  and
Seong-Cho Yu
N. Gay-Sanz
Affiliation:
Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco, 28049 Madrid, Spain
C. Prieto
Affiliation:
Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco, 28049 Madrid, Spain
A. de Andrés
Affiliation:
Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Cantoblanco, 28049 Madrid, Spain
M. Vázquez
Affiliation:
Instituto de Magnetismo Aplicado, Universidad Complutense de Madrid—Renfe and Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, P.O. Box 155, 28230 Las Rozas, Spain
Seong-Cho Yu
Affiliation:
Department of Physics, Chungbuk National University, Cheongju, 360–763 Korea
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Abstract

The local order around Fe, Co, and Cu atoms was investigated by extended x-ray absorption fine structure spectroscopy in Fe–Co–Cu nanocrystalline alloys prepared by mechanical alloying. In order to study the time evolution of the alloying process, Fe30Co20Cu50 samples were studied after several processing times. The analysis of the data shows that, in a first step, a binary Co–Cu alloy is formed, but iron remains separate in the form of nanocrystals with a high defect concentration. Afterwards, in a second step, the final ternary Fe–Co–Cu alloy with the face-centered-cubic structure is obtained.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 10 , October 1999 , pp. 3882 - 3888
Copyright
Copyright © Materials Research Society 1999

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