Pressure effects  on Al89La6Ni5 amorphous alloy crystallization

Yanxin Zhuang; Jianzhong Jiang; T. J. Zhou; Helge Kildahl Rasmussen; Leif Gerward; M. Mezouar; W. Crichton; A. Inoue

doi:10.1063/1.1332409

Pressure effects on Al89La6Ni5 amorphous alloy crystallization

Yanxin Zhuang, Jianzhong Jiang, T. J. Zhou, Helge Kildahl Rasmussen, Leif Gerward, M. Mezouar, W. Crichton, A. Inoue

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Abstract

The pressure effect on the crystallization of the Al89La6Ni5 amorphous alloy has been investigated by in situ high-pressure and high-temperature x-ray powder diffraction using synchrotron radiation. The amorphous alloy crystallizes in two steps in the pressure range studied (0-4 GPa). The first process, corresponding to simultaneous precipitation of fcc-Al crystals and the metastable bcc-(AlNi)(11)La-3-like phase, is governed by a eutectic reaction. The second process corresponds to the transformation of a residual amorphous alloy into fcc-Al, Al11La3, Al3Ni, and as yet unidentified phase(s). The applied pressure strongly affects the crystallization processes of the amorphous alloy. Both temperatures first decrease with pressure in the pressure range of 0-1 GPa and then increase with pressure up to 4 GPa. The results are discussed with reference to competing processes between the thermodynamic potential barrier and the diffusion activation energy under pressure. (C) 2000 American Institute of Physics.

Original language	English
Journal	Applied Physics Letters
Volume	77
Issue number	25
Pages (from-to)	4133-4135
ISSN	0003-6951
DOIs	https://doi.org/10.1063/1.1332409
Publication status	Published - 2000

Bibliographical note

Copyright (2000) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

Keywords

KINETICS
MECHANICAL-PROPERTIES
COMPOSITES
RAPID SOLIDIFICATION
AL-BASED SYSTEMS
DEFORMATION
ALUMINUM
NANOCRYSTALLINE ALLOYS
METALLIC GLASSES

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title = "Pressure effects on Al89La6Ni5 amorphous alloy crystallization",

abstract = "The pressure effect on the crystallization of the Al89La6Ni5 amorphous alloy has been investigated by in situ high-pressure and high-temperature x-ray powder diffraction using synchrotron radiation. The amorphous alloy crystallizes in two steps in the pressure range studied (0-4 GPa). The first process, corresponding to simultaneous precipitation of fcc-Al crystals and the metastable bcc-(AlNi)(11)La-3-like phase, is governed by a eutectic reaction. The second process corresponds to the transformation of a residual amorphous alloy into fcc-Al, Al11La3, Al3Ni, and as yet unidentified phase(s). The applied pressure strongly affects the crystallization processes of the amorphous alloy. Both temperatures first decrease with pressure in the pressure range of 0-1 GPa and then increase with pressure up to 4 GPa. The results are discussed with reference to competing processes between the thermodynamic potential barrier and the diffusion activation energy under pressure. (C) 2000 American Institute of Physics.",

keywords = "KINETICS, MECHANICAL-PROPERTIES, COMPOSITES, RAPID SOLIDIFICATION, AL-BASED SYSTEMS, DEFORMATION, ALUMINUM, NANOCRYSTALLINE ALLOYS, METALLIC GLASSES",

author = "Yanxin Zhuang and Jianzhong Jiang and Zhou, {T. J.} and Rasmussen, {Helge Kildahl} and Leif Gerward and M. Mezouar and W. Crichton and A. Inoue",

note = "Copyright (2000) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.",

year = "2000",

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T1 - Pressure effects on Al89La6Ni5 amorphous alloy crystallization

AU - Zhuang, Yanxin

AU - Jiang, Jianzhong

AU - Zhou, T. J.

AU - Rasmussen, Helge Kildahl

AU - Gerward, Leif

AU - Mezouar, M.

AU - Crichton, W.

AU - Inoue, A.

N1 - Copyright (2000) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

PY - 2000

Y1 - 2000

N2 - The pressure effect on the crystallization of the Al89La6Ni5 amorphous alloy has been investigated by in situ high-pressure and high-temperature x-ray powder diffraction using synchrotron radiation. The amorphous alloy crystallizes in two steps in the pressure range studied (0-4 GPa). The first process, corresponding to simultaneous precipitation of fcc-Al crystals and the metastable bcc-(AlNi)(11)La-3-like phase, is governed by a eutectic reaction. The second process corresponds to the transformation of a residual amorphous alloy into fcc-Al, Al11La3, Al3Ni, and as yet unidentified phase(s). The applied pressure strongly affects the crystallization processes of the amorphous alloy. Both temperatures first decrease with pressure in the pressure range of 0-1 GPa and then increase with pressure up to 4 GPa. The results are discussed with reference to competing processes between the thermodynamic potential barrier and the diffusion activation energy under pressure. (C) 2000 American Institute of Physics.

AB - The pressure effect on the crystallization of the Al89La6Ni5 amorphous alloy has been investigated by in situ high-pressure and high-temperature x-ray powder diffraction using synchrotron radiation. The amorphous alloy crystallizes in two steps in the pressure range studied (0-4 GPa). The first process, corresponding to simultaneous precipitation of fcc-Al crystals and the metastable bcc-(AlNi)(11)La-3-like phase, is governed by a eutectic reaction. The second process corresponds to the transformation of a residual amorphous alloy into fcc-Al, Al11La3, Al3Ni, and as yet unidentified phase(s). The applied pressure strongly affects the crystallization processes of the amorphous alloy. Both temperatures first decrease with pressure in the pressure range of 0-1 GPa and then increase with pressure up to 4 GPa. The results are discussed with reference to competing processes between the thermodynamic potential barrier and the diffusion activation energy under pressure. (C) 2000 American Institute of Physics.

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KW - MECHANICAL-PROPERTIES

KW - COMPOSITES

KW - RAPID SOLIDIFICATION

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KW - ALUMINUM

KW - NANOCRYSTALLINE ALLOYS

KW - METALLIC GLASSES

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