Item


Comparison of Fe-Ni based alloys prepared by ball milling and rapid solidification

Mechanical alloying (MA) and rapid solidification (RS) are two important routes to obtain amorphous alloys. An Fe-Ni based metal-metalloid alloy (Fe 50Ni30P14Si6) prepared by these two different processing routes was studied by differential scanning calorimetry, scanning electron microscopy with microanalysis, inductive coupled plasma, X-ray diffraction (XRD) and transmission Mössbauer spectroscopy (TMS). The results were compared with that obtained from other Fe-Ni based alloys of similar compositions. The structural analyses show that the materials obtained by mechanical alloying are not completely disordered after 40 h of milling whereas fully amorphous alloys were obtained by rapid solidification. TMS analyses show that, independent of the composition, after milling for 40 h, about 7% of the Fe remains unreacted. Furthermore, the thermal stability of mechanically alloyed samples is lower than that of the analogous material prepared by rapid solidification. In the MA alloys, a broad exothermic process associated to structural relaxation begins at low temperature. XRD patterns of crystallized alloys indicate that the crystallization products are bcc(Fe,Ni), fcc(Ni,Fe), and (Fe,Ni)-phosphides and -silicides

Financial support from DURSI (Project No. 20001SGR-00190) and from CICYT (Project No. MAT2000-0388)

© Journal of Materials Science, 2004, vol. 39, p. 5147-5150

Springer Verlag

Author: Suñol Martínez, Joan Josep
González Gasch, Àlex
Escoda i Acero, Ma. Lluïsa
Date: 2004 August 1
Abstract: Mechanical alloying (MA) and rapid solidification (RS) are two important routes to obtain amorphous alloys. An Fe-Ni based metal-metalloid alloy (Fe 50Ni30P14Si6) prepared by these two different processing routes was studied by differential scanning calorimetry, scanning electron microscopy with microanalysis, inductive coupled plasma, X-ray diffraction (XRD) and transmission Mössbauer spectroscopy (TMS). The results were compared with that obtained from other Fe-Ni based alloys of similar compositions. The structural analyses show that the materials obtained by mechanical alloying are not completely disordered after 40 h of milling whereas fully amorphous alloys were obtained by rapid solidification. TMS analyses show that, independent of the composition, after milling for 40 h, about 7% of the Fe remains unreacted. Furthermore, the thermal stability of mechanically alloyed samples is lower than that of the analogous material prepared by rapid solidification. In the MA alloys, a broad exothermic process associated to structural relaxation begins at low temperature. XRD patterns of crystallized alloys indicate that the crystallization products are bcc(Fe,Ni), fcc(Ni,Fe), and (Fe,Ni)-phosphides and -silicides
Financial support from DURSI (Project No. 20001SGR-00190) and from CICYT (Project No. MAT2000-0388)
Format: application/pdf
Citation: 10.1023/B:JMSC.0000039200.71814.03
ISSN: 0022-2461 (versió paper)
1573-4803 (versió electrònica)
Document access: http://hdl.handle.net/10256/12740
Language: eng
Publisher: Springer Verlag
Collection: CICYT/PN 2000-2003/MAT2000-0388-C02-02
Reproducció digital del document publicat a: 10.1023/B:JMSC.0000039200.71814.03
Articles publicats (D-F)
Is part of: © Journal of Materials Science, 2004, vol. 39, p. 5147-5150
Rights: Tots els drets reservats
Subject: Aliatges
Alloys
Aliatges -- Propietats mecàniques
Alloys -- Mechanical properties
Title: Comparison of Fe-Ni based alloys prepared by ball milling and rapid solidification
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

Subjects

Authors


Warning: Unknown: write failed: No space left on device (28) in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/lib/php5) in Unknown on line 0