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

doi:10.1016/j.matdes.2019.108186

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

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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 Al_67-56Cu_24-31Fe_9-13 and Al_66-58Cu_23-28Fe_11-14 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:

Zhu, Lilong; Soto-Medina, Sujeily; Cuadrado-Castillo, Wesley; Hennig, Richard G.;

Publication Date:: 2020-01-01

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.

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                    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.  doi:10.1016/j.matdes.2019.108186.

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                    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.  doi:10.1016/j.matdes.2019.108186.

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@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         = {2020},

  month        = {1}

}

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