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Thermal behavior of several Fe-Ni alloys prepared by mechanical alloying and rapid solidification

Several Fe-Ni-P-Si alloys were produced in an amorphous state by mechanical alloying and rapid solidification. Thermal behavior of the as prepared alloys was analyzed and compared with identical alloys stored during 1 and 2 years. During annealing time, several exothermic processes related to the structural relaxation were detected at low temperature and with further crystallization at high temperature. As increasing the storage time, the powdered samples were relaxed at lower temperatures. The activation energy, E, of the main crystallization process varies between 2.7 and 4.7 eV at.-1. The E values obtained remains similar with the storage time. Small contamination from the milling tools was found. Furthermore, powdered alloys are more sensible to oxidation processes than as quenched ribbons

Financial support from MICYT (project No.MAT2003-08271) and DURSI (project 2001SGR-00190) isacknowledged. J. Bonastre also agrees a Spanish FPI fellowship

© Journal of Thermal Analysis and Calorimetry, 2005, vol. 80, núm. 2, p. 253-256

Springer Verlag

Manager: Ministerio de Ciencia y Tecnología (Espanya)
Author: González Gasch, Àlex
Suñol Martínez, Joan Josep
Bonastre i Muñoz, Jordi
Escoda i Acero, Ma. Lluïsa
Caleya, J.
Date: 2005 May 1
Abstract: Several Fe-Ni-P-Si alloys were produced in an amorphous state by mechanical alloying and rapid solidification. Thermal behavior of the as prepared alloys was analyzed and compared with identical alloys stored during 1 and 2 years. During annealing time, several exothermic processes related to the structural relaxation were detected at low temperature and with further crystallization at high temperature. As increasing the storage time, the powdered samples were relaxed at lower temperatures. The activation energy, E, of the main crystallization process varies between 2.7 and 4.7 eV at.-1. The E values obtained remains similar with the storage time. Small contamination from the milling tools was found. Furthermore, powdered alloys are more sensible to oxidation processes than as quenched ribbons
Financial support from MICYT (project No.MAT2003-08271) and DURSI (project 2001SGR-00190) isacknowledged. J. Bonastre also agrees a Spanish FPI fellowship
Format: application/pdf
Citation: 004328
ISSN: 1388-6150 (versió paper)
1588-2926 (versió electrònica)
Document access: http://hdl.handle.net/10256/12732
Language: eng
Publisher: Springer Verlag
Collection: MICYT/2003-2006/MAT2003-08271-C02-02
Reproducció digital del document publicat a: http://dx.doi.org/10.1007/s10973-005-0644-3
Articles publicats (D-F)
Is part of: © Journal of Thermal Analysis and Calorimetry, 2005, vol. 80, núm. 2, p. 253-256
Rights: Tots els drets reservats
Subject: Aliatges
Alloys
Aliatges -- Propietats tèrmiques
Alloys -- Thermal properties
Title: Thermal behavior of several Fe-Ni alloys prepared by mechanical alloying and rapid solidification
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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