Experimental investigation of the Al–Co–Fe phase diagram over the whole composition range

Zhu, Lilong; Soto-Medina, Sujeily; Hennig, Richard G.; Manuel, Michele V.

doi:10.1016/j.jallcom.2019.152110

Title: Experimental investigation of the Al–Co–Fe phase diagram over the whole composition range

Abstract

Knowledge of the phase stability in the Al-Co-Fe ternary system is critical for developing Al-Fe-Si-based low-cost lightweight high-temperature materials and is thus experimentally investigated over the whole composition range. Three complete isothermal sections at 1000, 900 and 800 °C were constructed based on the results measured from three identical Co/Fe/Al5Fe2 diffusion triples and forty-three equilibrated alloys using data from scanning electron microscopy (SEM), electron probe microanalysis (EPMA) and X-ray diffraction (XRD). At all the three temperatures, a continuous solution, Al13(Co,Fe)4, was confirmed between the Al13Fe4 and M-Al13Co4 phases. Phase boundaries of the γ, α, β, Al2Fe, Al5Fe2, Al5Co2, Al9Co2 and Al13(Co,Fe)4 phases and the corresponding phase equilibrium relations were clearly defined from the obtained tie-lines and phase boundary data. Three three-phase regions were confirmed in the 1000 °C isothermal section, while four three-phase regions were confirmed in the 900 and 800 °C isothermal sections. The large amount of new phase equilibrium data proposed in this work will serve as reliable input for future thermodynamic assessments of the Al-Co-Fe system within the CALPHAD (CALculation of PHAse Diagrams) framework to improve the current Al thermodynamic databases.

Authors:

Zhu, Lilong; Soto-Medina, Sujeily; 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:: 1560879

Alternate Identifier(s):: OSTI ID: 1593303; OSTI ID: 1593310

Grant/Contract Number:: EE0007742

Resource Type:: Published Article

Journal Name:: Journal of Alloys and Compounds

Additional Journal Information:: Journal Name: Journal of Alloys and Compounds Journal Volume: 815 Journal Issue: C; Journal ID: ISSN 0925-8388

Publisher:: Elsevier

Country of Publication:: Netherlands

Language:: English

Subject:: 36 MATERIALS SCIENCE; Al-Co-Fe system; Phase diagram; Diffusion triple; Equilibrated alloy; CALPHAD

Citation Formats


                    Zhu, Lilong, Soto-Medina, Sujeily, Hennig, Richard G., and Manuel, Michele V. Experimental investigation of the Al–Co–Fe phase diagram over the whole composition range.  Netherlands: N. p., 2020. 
Web.  doi:10.1016/j.jallcom.2019.152110.

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                    Zhu, Lilong, Soto-Medina, Sujeily, Hennig, Richard G., & Manuel, Michele V. Experimental investigation of the Al–Co–Fe phase diagram over the whole composition range.  Netherlands.  https://doi.org/10.1016/j.jallcom.2019.152110

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                    Zhu, Lilong, Soto-Medina, Sujeily, Hennig, Richard G., and Manuel, Michele V. Wed .  
"Experimental investigation of the Al–Co–Fe phase diagram over the whole composition range".  Netherlands.  https://doi.org/10.1016/j.jallcom.2019.152110.

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@article{osti_1560879,

  title        = {Experimental investigation of the Al–Co–Fe phase diagram over the whole composition range},

  author       = {Zhu, Lilong and Soto-Medina, Sujeily and Hennig, Richard G. and Manuel, Michele V.},

  abstractNote = {Knowledge of the phase stability in the Al-Co-Fe ternary system is critical for developing Al-Fe-Si-based low-cost lightweight high-temperature materials and is thus experimentally investigated over the whole composition range. Three complete isothermal sections at 1000, 900 and 800 °C were constructed based on the results measured from three identical Co/Fe/Al5Fe2 diffusion triples and forty-three equilibrated alloys using data from scanning electron microscopy (SEM), electron probe microanalysis (EPMA) and X-ray diffraction (XRD). At all the three temperatures, a continuous solution, Al13(Co,Fe)4, was confirmed between the Al13Fe4 and M-Al13Co4 phases. Phase boundaries of the γ, α, β, Al2Fe, Al5Fe2, Al5Co2, Al9Co2 and Al13(Co,Fe)4 phases and the corresponding phase equilibrium relations were clearly defined from the obtained tie-lines and phase boundary data. Three three-phase regions were confirmed in the 1000 °C isothermal section, while four three-phase regions were confirmed in the 900 and 800 °C isothermal sections. The large amount of new phase equilibrium data proposed in this work will serve as reliable input for future thermodynamic assessments of the Al-Co-Fe system within the CALPHAD (CALculation of PHAse Diagrams) framework to improve the current Al thermodynamic databases.},

  doi          = {10.1016/j.jallcom.2019.152110},

  journal      = {Journal of Alloys and Compounds},

  number       = C,

  volume       = 815,

  place        = {Netherlands},

  year         = {2020},

  month        = {1}

}

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Title: Experimental investigation of the Al–Co–Fe phase diagram over the whole composition range

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Phase separation of BCC phase in the Co-rich portion of Co-Fe-Al system
journal, April 2004

Thermal conductivity mapping of the Ni–Al system and the beta-NiAl phase in the Ni–Al–Cr system
journal, June 2012

Microstructure and mechanical property of as-cast, -homogenized, and -deformed AlxCoCrFeNi (0≤x≤2) high-entropy alloys
journal, November 2009

Phase decomposition and precipitation of metastable A2 phase in B2 ordered Co–Al–Fe alloys
journal, March 2006

Formation of quasiperiodic and related periodic intermetallics in alloy systems of aluminum with transition metals
journal, June 2007

Solid-liquid phase equilibria in the Al-Fe-Si system at 727 °C
journal, November 2004

Experimental reinvestigation of Al–Co phase diagram in vicinity of Al13Co4 family of phases
journal, October 2015

Equilibrium high entropy alloy phase stability from experiments and thermodynamic modeling
journal, March 2018

Stable and metastable quasicrystals in Al-based alloy systems with transition metals
journal, March 2004

Thermodynamic and diffusion kinetic studies of the Fe-Co system
journal, September 2017

Re-determination of transition temperatures in the Fe–Al system by differential thermal analysis
journal, July 2007

Measurement of interdiffusion and impurity diffusion coefficients in the bcc phase of the Ti–X (X = Cr, Hf, Mo, Nb, V, Zr) binary systems using diffusion multiples
journal, November 2016

Metastable Two-Phase Field(A2+B2) in Co-Al-Fe and Co-Al Alloy Systems
journal, March 2004