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X-ray line profile analysis of the ball-milled Fe-30Co alloy

This work deals with the microstructural properties of the Fe-30Co alloy prepared by ball milling of elemental iron and cobalt powders. The obtained mixed powder has been characterized by means of scanning electron microscope, X-ray microanalysis, laser diffraction, X-ray diffraction and microhardness measurements. X-ray line profile analysis based on the Rietveld method and adopting two different models has been used for the microstructural study. The refinement of the X-ray patterns shows that after 3 h of high energy milling the Fe(Co) is formed. The obtained Fe(Co) solid solution is characterized by body centered cubic structure with a lattice parameter a = 0.28564 ± 0.00004 nm and an ellipsoidal crystallite and microstrain field. The dissolution of cobalt in iron matrix is accompanied by the compression of the crystalline lattice by 0.37%. The progress of milling process produces an increase of the Debye-Waller factor and the dislocation density leading to the hardening of the powder. The variation of microhardness with milling time shows a change in hardening mechanisms

Financial support from MICYT MAT2006-13925-C02-02 (FEDER) and DURSI 2005SGR-00201 projects is acknowledged

Elsevier

Director: Ministerio de Educación y Ciencia (Espanya)
Generalitat de Catalunya. Agència de Gestió d’Ajuts Universitaris i de Recerca
Autor: Laala-Bouali, H.
Bentayeb, F. Z.
Louidi, S.
Guo, X.
Tria, S.
Suñol Martínez, Joan Josep
Escoda i Acero, Ma. Lluïsa
Data: 1 gener 2013
Resum: This work deals with the microstructural properties of the Fe-30Co alloy prepared by ball milling of elemental iron and cobalt powders. The obtained mixed powder has been characterized by means of scanning electron microscope, X-ray microanalysis, laser diffraction, X-ray diffraction and microhardness measurements. X-ray line profile analysis based on the Rietveld method and adopting two different models has been used for the microstructural study. The refinement of the X-ray patterns shows that after 3 h of high energy milling the Fe(Co) is formed. The obtained Fe(Co) solid solution is characterized by body centered cubic structure with a lattice parameter a = 0.28564 ± 0.00004 nm and an ellipsoidal crystallite and microstrain field. The dissolution of cobalt in iron matrix is accompanied by the compression of the crystalline lattice by 0.37%. The progress of milling process produces an increase of the Debye-Waller factor and the dislocation density leading to the hardening of the powder. The variation of microhardness with milling time shows a change in hardening mechanisms
Financial support from MICYT MAT2006-13925-C02-02 (FEDER) and DURSI 2005SGR-00201 projects is acknowledged
Format: application/pdf
Accés al document: http://hdl.handle.net/10256/12727
Llenguatge: eng
Editor: Elsevier
Col·lecció: info:eu-repo/semantics/altIdentifier/doi/10.1016/j.apt.2012.04.007
info:eu-repo/semantics/altIdentifier/issn/0921-8831
info:eu-repo/semantics/altIdentifier/eissn/1568-5527
info:eu-repo/grantAgreement/MEC//MAT2006-13925-C02-02/ES/PROPIEDADES MAGNETICAS Y TERMOELASTICAS DE MATERIALES PARA APLICACIONES EN SENSORES MAGNETOINDUCTIVOS Y EN MEMORIAS MAGNETICAS DE FORMA/
AGAUR/2005-2008/2005 SGR-00201
Drets: Tots els drets reservats
Matèria: Microscòpia electrònica d’escombratge
Scanning electron microscopy
Microestructura
Microstructure
Materials nanoestructurats -- Propietats mecàniques
Nanostructured materials -- Mechanical properties
Metalls de transició -- Aliatges
Transition metals -- Alloys
Títol: X-ray line profile analysis of the ball-milled Fe-30Co alloy
Tipus: info:eu-repo/semantics/article
Repositori: DUGiDocs

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