Mössbauer Effect Studies of Fe–Base Alloys during Mechanical Alloying and Grinding (Overview)

Mossbauer effect studies of mechanical alloying and mechanical grinding of Fe-B, Fe-Sn and Fe-TM-Al (TM = Ni, Cu), complemented by X-ray diffraction analysis are presented. Some of these systems (Fe-Sn) are especially suited for these type of research because the environments of both elements can be...

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Autores principales: Cabrera, Alejandra Fabiana, Fernández van Raap, Marcela Beatriz, Meyer, Marcos, Rodríguez Torres, Claudia Elena, Mendoza Zélis, Luis Alejandro, Sánchez, Francisco Homero
Formato: Articulo
Lenguaje:Inglés
Publicado: 1995
Materias:
Física
Mössbauer effect
Iron-Tin
Aluminum-Copper-Iron
Iron-Boron
Solid solutions
Local atomic environments
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123286
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123286
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Mössbauer effect
Iron-Tin
Aluminum-Copper-Iron
Iron-Boron
Solid solutions
Local atomic environments
spellingShingle Física
Mössbauer effect
Iron-Tin
Aluminum-Copper-Iron
Iron-Boron
Solid solutions
Local atomic environments
Cabrera, Alejandra Fabiana
Fernández van Raap, Marcela Beatriz
Meyer, Marcos
Rodríguez Torres, Claudia Elena
Mendoza Zélis, Luis Alejandro
Sánchez, Francisco Homero
Mössbauer Effect Studies of Fe–Base Alloys during Mechanical Alloying and Grinding (Overview)
topic_facet Física
Mössbauer effect
Iron-Tin
Aluminum-Copper-Iron
Iron-Boron
Solid solutions
Local atomic environments
description Mossbauer effect studies of mechanical alloying and mechanical grinding of Fe-B, Fe-Sn and Fe-TM-Al (TM = Ni, Cu), complemented by X-ray diffraction analysis are presented. Some of these systems (Fe-Sn) are especially suited for these type of research because the environments of both elements can be probed. In all cases powders were processed with a Retsch MM 2 horizontal vibratory mill under argon atmosphere. In Fe 1-x Sn x (0.15 ≤ x ≤ 0.40), the evolution of mechanical alloying with time and the dependence of the stationary state with composition were investigated. An intermediate superparamagnetic FeSn 2 state and a stationary bcc solid solution with composition fluctuations were inferred from the Mossbauer spectra. Solubility of tin into bcc iron was found to be extended up to a maximum of about 22 at.%. Pure powder mixtures of nominal composition Al 75 Ni 10 Fe 15 , Al 65 Ni 20 Fe 15 and Al 63 Cu 25 Fe 12 have been mechanically alloyed. Stable disordered crystalline phases were obtained after milling and, in some cases, the partial ordering of bcc structures induced by milling was observed. Further annealings did not produce structural changes but removed the remaining disorder. The characteristic quadrupole interaction parameters were obtained by Mossbauer spectroscopy. The evolution of Fe 2 B with grinding time was studied. The first milling stage was characterized by fragmentation and accumulation of strain. On further processing, segregation of α-Fe occurred while grain size reduction continued and strain was partially removed. For longer grinding times separation of α-Fe proceeded at an almost steady rate. Two additional experiments designed to reduce and increase oxygen contamination let us tentatively discard this element as the main responsible for the observed decomposition.
format Articulo
Articulo
author Cabrera, Alejandra Fabiana
Fernández van Raap, Marcela Beatriz
Meyer, Marcos
Rodríguez Torres, Claudia Elena
Mendoza Zélis, Luis Alejandro
Sánchez, Francisco Homero
author_facet Cabrera, Alejandra Fabiana
Fernández van Raap, Marcela Beatriz
Meyer, Marcos
Rodríguez Torres, Claudia Elena
Mendoza Zélis, Luis Alejandro
Sánchez, Francisco Homero
author_sort Cabrera, Alejandra Fabiana
title Mössbauer Effect Studies of Fe–Base Alloys during Mechanical Alloying and Grinding (Overview)
title_short Mössbauer Effect Studies of Fe–Base Alloys during Mechanical Alloying and Grinding (Overview)
title_full Mössbauer Effect Studies of Fe–Base Alloys during Mechanical Alloying and Grinding (Overview)
title_fullStr Mössbauer Effect Studies of Fe–Base Alloys during Mechanical Alloying and Grinding (Overview)
title_full_unstemmed Mössbauer Effect Studies of Fe–Base Alloys during Mechanical Alloying and Grinding (Overview)
title_sort mössbauer effect studies of fe–base alloys during mechanical alloying and grinding (overview)
publishDate 1995
url http://sedici.unlp.edu.ar/handle/10915/123286
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