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Title: New experimental studies on the phase diagram of the Al-Cu-Fe quasicrystal-forming system

Abstract

Phase diagrams of quasicrystal-forming alloy systems, such as Al-Cu-Fe, are essential to the continued development and fundamental understanding of quasicrystalline alloys, especially for the synthesis of single quasicrystals. Isothermal sections of the Al-Cu-Fe system at 700, 800, and 1000 °C were constructed over the whole composition range by investigations of three Cu/Fe/Al5Fe2 diffusion triples and forty-seven equilibrated alloys using scanning electron microscopy (SEM), electron probe microanalysis(EPMA), and X-ray diffraction (XRD). Based on experimental measurements and reasonable assumptions, eleven, eight, and six three-phase equilibria were obtained at 700, 800, and 1000 °C, respectively. The existence of the ternary I-Al6Cu2Fe icosahedral quasicrystalline phase was confirmed at both 700 and 800 °C, and the ternary omega-Al7Cu2Fe phase was only found at 700 °C. The stable composition range of the I phase was measured to be Al67-56Cu24-31Fe9-13 and Al66-58Cu23-28Fe11-14 at 700 and 800 °C, respectively. A wide continuous solution region formed among the α-Fe, β-AlFe, and Cu3Al phases at 800 and 1000 °C. A sufficiently large amount of new experimental phase equilibrium data was collected for the Al-Cu-Fe system that will help improve future thermodynamic description of this ternary system within the CALPHAD (CALculation of PHAse Diagrams) framework for designing Al-Cu-Fe-based quasicrystals.

Authors:
; ; ; ; ORCiD logo
Publication Date:
Research Org.:
Univ. of Florida, Gainesville, FL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1560357
Alternate Identifier(s):
OSTI ID: 1593308
Grant/Contract Number:  
EE0007742
Resource Type:
Published Article
Journal Name:
Materials & Design
Additional Journal Information:
Journal Name: Materials & Design Journal Volume: 185 Journal Issue: C; Journal ID: ISSN 0264-1275
Publisher:
Elsevier
Country of Publication:
United Kingdom
Language:
English
Subject:
36 MATERIALS SCIENCE; Al-Cu-Fe system; Quasicrystals; Phase diagram; Diffusion triple; Equilibrated alloy; CALPHAD

Citation Formats

Zhu, Lilong, Soto-Medina, Sujeily, Cuadrado-Castillo, Wesley, Hennig, Richard G., and Manuel, Michele V. New experimental studies on the phase diagram of the Al-Cu-Fe quasicrystal-forming system. United Kingdom: N. p., 2020. Web. doi:10.1016/j.matdes.2019.108186.
Zhu, Lilong, Soto-Medina, Sujeily, Cuadrado-Castillo, Wesley, Hennig, Richard G., & Manuel, Michele V. New experimental studies on the phase diagram of the Al-Cu-Fe quasicrystal-forming system. United Kingdom. https://doi.org/10.1016/j.matdes.2019.108186
Zhu, Lilong, Soto-Medina, Sujeily, Cuadrado-Castillo, Wesley, Hennig, Richard G., and Manuel, Michele V. Wed . "New experimental studies on the phase diagram of the Al-Cu-Fe quasicrystal-forming system". United Kingdom. https://doi.org/10.1016/j.matdes.2019.108186.
@article{osti_1560357,
title = {New experimental studies on the phase diagram of the Al-Cu-Fe quasicrystal-forming system},
author = {Zhu, Lilong and Soto-Medina, Sujeily and Cuadrado-Castillo, Wesley and Hennig, Richard G. and Manuel, Michele V.},
abstractNote = {Phase diagrams of quasicrystal-forming alloy systems, such as Al-Cu-Fe, are essential to the continued development and fundamental understanding of quasicrystalline alloys, especially for the synthesis of single quasicrystals. Isothermal sections of the Al-Cu-Fe system at 700, 800, and 1000 °C were constructed over the whole composition range by investigations of three Cu/Fe/Al5Fe2 diffusion triples and forty-seven equilibrated alloys using scanning electron microscopy (SEM), electron probe microanalysis(EPMA), and X-ray diffraction (XRD). Based on experimental measurements and reasonable assumptions, eleven, eight, and six three-phase equilibria were obtained at 700, 800, and 1000 °C, respectively. The existence of the ternary I-Al6Cu2Fe icosahedral quasicrystalline phase was confirmed at both 700 and 800 °C, and the ternary omega-Al7Cu2Fe phase was only found at 700 °C. The stable composition range of the I phase was measured to be Al67-56Cu24-31Fe9-13 and Al66-58Cu23-28Fe11-14 at 700 and 800 °C, respectively. A wide continuous solution region formed among the α-Fe, β-AlFe, and Cu3Al phases at 800 and 1000 °C. A sufficiently large amount of new experimental phase equilibrium data was collected for the Al-Cu-Fe system that will help improve future thermodynamic description of this ternary system within the CALPHAD (CALculation of PHAse Diagrams) framework for designing Al-Cu-Fe-based quasicrystals.},
doi = {10.1016/j.matdes.2019.108186},
journal = {Materials & Design},
number = C,
volume = 185,
place = {United Kingdom},
year = {Wed Jan 01 00:00:00 EST 2020},
month = {Wed Jan 01 00:00:00 EST 2020}
}

Journal Article:
Free Publicly Available Full Text
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https://doi.org/10.1016/j.matdes.2019.108186

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