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Title: Mechanical milling of the intermetallic AlFe
Author: Meyer, M.
Mendoza-Zélis, L.
Sánchez, F. H.
Clavaguera-Mora, M. T.
Clavaguera, N. (Clavaguera Plaja)
Keywords: Regla de les fases i equilibri
Compostos intermetàl·lics
Espectroscòpia Mössbauer
Difracció de raigs X
Phase rule and equilibrium
Intermetallic compounds
Mössbauer spectroscopy
X-rays diffraction
Issue Date: 1999
Publisher: The American Physical Society
Abstract: The intermetallic compound AlFe in its ordered B2 phase has been ground under Ar in a ball-milling device. The system evolution under mechanical work has been examined as a function of time of milling by x-ray diffraction, transmission Mo¨ssbauer spectroscopy, and differential scanning calorimetry. Short and long range disorder was observed. The evolution of the long range order parameter with milling time is analyzed up to the completion of the solid state reaction when a steady state value is reached. The short range order evolution is consistent with a nonstatistical order distribution throughout the sample but mainly distributed in two regions with different degrees of order each. Kinetic analysis of the reordering and recrystallization has been performed under continuous heating and isothermal calorimetric regimes. Modeling of these processes is presented as well as the estimated values of both the enthalpy and the activation energy of the reordering process. Results are compared with preceding information on related systems.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 1999, vol. 60, núm. 5, p. 3206-3212
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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