The role of Fe and Cu additions on the structural, thermal and magnetic properties of amorphous Al-Ce-Fe-Cu alloys

Kelhar, Luka; Ferčič, Jana; Kržmanc, Marjeta Maček; Zavašnik, Janez; Šturm, Sašo; Koželj, Primož; Kobe, Spomenka; Dubois, Jean‐Marie

doi:10.1016/j.jnoncrysol.2018.01.003

Cited by 5 publications

(2 citation statements)

References 28 publications

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“…Most studies on Al–Cu–Fe alloys were aimed at the synthesis of Al 63-70 Cu 20-25 Fe 10-12 quasicrystals of icosahedral structure [ 3 , 4 , 5 , 6 , 7 ] for a variety of applications: antimicrobial agents [ 8 ], decomposition of hazardous materials [ 9 ], carbon nanotube growth catalysts [ 10 ], magnetic materials [ 4 , 11 ], anodes in lithium batteries [ 12 ], fillers with ultralow wear [ 13 ], and catalysts in steam reforming of methanol [ 14 , 15 ]. Moreover, nanostructured powder alloys are becoming popular in traditional heterogeneous catalysis [ 16 , 17 ], e.g., in hydrogenation reactions of CO (CO 2 ) [ 18 ], synthesis of carbon fibers [ 19 ], decomposition of chlorine-containing hydrocarbons [ 20 , 21 ], decomposition of polymers [ 22 ], and in steam and dry reforming [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Elimination of Composition Segregation in 33Al–45Cu–22Fe (at.%) Powder by Two-Stage High-Energy Mechanical Alloying

et al. 2022

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In the present work, complex powder alloys containing spinel as a minor phase were produced by mechanical alloying in a high-energy planetary ball mill from a 33Al–45Cu–22Fe (at.%) powder blend. These alloys show characteristics suitable for the synthesis of promising catalysts. The alloying was conducted in two stages: at the first stage, a Cu+Fe powder mixture was ball-milled for 90 min; at the second stage, Al was added, and the milling process was continued for another 24 min. The main products of mechanical alloying formed at each stage were studied using X-ray diffraction phase analysis, Mössbauer spectroscopy, transmission electron microscopy, and energy-dispersive spectroscopy. At the end of the first stage, crystalline iron was not found. The main product of the first stage was a metastable Cu(Fe) solid solution with a face-centered cubic structure. At the second stage, the Cu(Fe) solid solution transformed to Cu(Al), several Fe-containing amorphous phases, and a spinel phase. The products of the two-stage process were different from those of the single-stage mechanical alloying of the ternary elemental powder mixture; the formation of undesirable intermediate phases was avoided, which ensured excellent composition uniformity. A sequence of solid-state reactions occurring during mechanical alloying was proposed. Mesopores and a spinel phase were the features of the two-stage milled material (both are desirable for the target catalyst).

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Section: Introductionmentioning

confidence: 99%

Elimination of Composition Segregation in 33Al–45Cu–22Fe (at.%) Powder by Two-Stage High-Energy Mechanical Alloying

et al. 2022

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“…The hot working of amorphous powder needs better thermal stability and higher glass-forming ability (GFA), which needs to produce an excellent amorphous powder. Researchers have been a focused effort that aims to understand the effect of minor alloying additions on GFA and thermal stability and have proposed many theories on structure, thermodynamic and kinetic factors, so as to find out the rule of amorphous formation, optimize the composition design of amorphous alloy and find the amorphous alloy system which are beneficial to later application [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. It is generally believed that the amorphous alloy system should contain three or more elements, the atomic size difference of the main components should generally be greater than 12% and with a large negative mixing enthalpy.…”

Section: Introductionmentioning

confidence: 99%

Glass-Forming Ability and Thermal Properties of Al70Fe12.5V12.5X5(X = Zr, Nb, Ni) Amorphous Alloys via Minor Alloying Additions

Wang

et al. 2021

Nanomaterials

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The Al70Fe12.5V12.5Ni5, Al70Fe12.5V12.5Zr5 and Al70Fe12.5V12.5Nb5 alloys were prepared via mechanical alloying. The influence of Zr, Nb or Ni addition on the glass-forming ability of Al-Fe-V amorphous alloys have been investigated. The structure of Al70Fe12.5V12.5Ni5 was amorphous and Al70Fe12.5V12.5Zr5 was not completely amorphous by transmission electron microscopy, selected area electron diffraction and differential scanning calorimetry. Different criteria were used to evaluate the influence of the addition of alloy elements on the Glass-forming ability. The Al70Fe12.5V12.5Ni5 amorphous alloys exhibits higher glass-forming ability and activation energies of crystallization. Comparison of the effective atomic size ratio and mixture enthalpy on the glass-forming ability of these amorphous alloys demonstrates that the effective atomic size ratio value becomes more significant than the values of mixture enthalpy.

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Heating/cooling-induced formation, dissociation and phase separation of CuFe2O4 during thermal oxidation of Sm2(Co, Fe, Cu, Zr)17 permanent magnet

Mittireddi,

Makani,

Singh

et al. 2024

Corrosion Science

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The role of Fe and Cu additions on the structural, thermal and magnetic properties of amorphous Al-Ce-Fe-Cu alloys

Cited by 5 publications

References 28 publications

Elimination of Composition Segregation in 33Al–45Cu–22Fe (at.%) Powder by Two-Stage High-Energy Mechanical Alloying

Elimination of Composition Segregation in 33Al–45Cu–22Fe (at.%) Powder by Two-Stage High-Energy Mechanical Alloying

Glass-Forming Ability and Thermal Properties of Al70Fe12.5V12.5X5(X = Zr, Nb, Ni) Amorphous Alloys via Minor Alloying Additions

Heating/cooling-induced formation, dissociation and phase separation of CuFe2O4 during thermal oxidation of Sm2(Co, Fe, Cu, Zr)17 permanent magnet

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