Magnetic properties and thermal ordering of mechanically alloyed Fe–40at% Al

Zhang, Qi; Baker, I.

doi:10.1016/j.intermet.2005.07.005

Cited by 89 publications

(60 citation statements)

References 50 publications

(61 reference statements)

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“…After 30 hours of milling, one can see a rapid decrease of the initial value of the mean crystallite to 15 nm, then a slight increase to reach a value of 19 nm after 50h of milling. This is most probably due to dynamic recrystallization of grains created by local heating during the mechanical alloying process [20]. After that, the Cu(Fe) crystallites are slightly refined as the milling time increases and reached a final value of about 13nm at 120 h of milling.…”

Section: Methodsmentioning

confidence: 99%

Structural characterization of mechanically alloyed nanocrystalline Cu-Fe: Strain broadening due to dislocations

Azabou

Escoda

Suñol

et al. 2012

EPJ Web of Conferences

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Abstract. Nanocrystalline Cu(Fe) solid solution was successfully synthesized by using high-energy mechanical milling. The structural and morphological changes during mechanical milling were investigated by X-ray diffraction and scanning electron microscopy. The patterns so obtained were analyzed using the X'Pert High Score Plus program. The final product of the mechanical alloying process was nanocrystalline FCC Cu(Fe) solid solution with a mean crystallite size in the range of few nanometers. The final microstructure, especially the high levels of lattice strains was explained by the presence of dislocations, with a dislocation density of about 7.4×10 16 m −2 . The identified steady-state saturation values of these parameters can be related to accumulate strain hardening of the powder material during longer milling times.

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Section: Methodsmentioning

confidence: 99%

Structural characterization of mechanically alloyed nanocrystalline Cu-Fe: Strain broadening due to dislocations

Azabou

Escoda

Suñol

et al. 2012

EPJ Web of Conferences

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“…These properties make FeAl alloys a potential candidate for structural and coating applications and prove it to be a promising substitute for stainless steel [3,4,5]. Stoichiometric FeAl shows either an ordered B2 phase or a disordered A2 phase.…”

Section: Introductionmentioning

confidence: 99%

Electronic structure of FeAl alloy studied by resonant photoemission spectroscopy and Ab initio calculations

Mondal

Banik

Kamal

et al. 2016

Journal of Alloys and Compounds

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Abstract. Resonant photoemission spectroscopy has been used to investigate the character of Fe 3d states in FeAl alloy. Fe 3d states have two different character, first is of itinerant nature located very close to the Fermi level, and second, is of less itinerant (relatively localized character), located beyond ∼2 eV below the Fermi level. These distinct states are clearly distinguishable in the resonant photoemission data. Comparison between the results obtained from experiments and first principle based electronic structure calculation show that the origin of the itinerant character of the Fe 3d states is due to the ordered B2 structure, whereas the relatively less itinerant (localized) Fe 3d states are from the disorders present in the sample. The exchange splitting of the Fe 3s core level peak confirms the presence of local moment in this system. It is found that the itinerant electrons arise due to the hybridization between Fe 3d and Al 3s − 3p states. Presence of hybridization is observed as a shift in the Al 2p core-level spectra as well as in the X-ray near edge absorption spectra towards lower binding energy. Our photoemission results are thus explained by the co-existence of ordered and disordered phases in the system.

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“…Many works have been reported on the synthesis of FeAl alloys by different kinds of planetary ball mill systems (Low-energy horizontal [14,15], SPEX 8000D [16,17,19,20], High-energy planetary [18,21]); however, to our knowledge, no reports on the elaboration of FeAl compounds by using the vario-planetary high energy ball mill (Fritsch P4) have been found in the literature. It is known that the high energy planetary ball mill (Fritsch P4) exhibits the particularity to control separately the rotation speeds of the main disk () and the vials (Ω) and consequently the milling mode.…”

Section: Introductionmentioning

confidence: 99%

“…We use the shock mode when Ω >>  and the friction mode when Ω <<  [22]. The effect of milling modes (friction or shock) has already been studied for Fe 80 Ni 20 and Fe 90 Ni 10 compounds [23] and it has been shown that the variation of milling mode influences the structural, hyperfine and magnetic properties of these alloys. In this perspective, we have studied the effect of Al content on the structural, microstructural and hyperfine properties of Fe 100-x Al x powder using the P4 planetary ball mill.…”

Section: Introductionmentioning

confidence: 99%

Structural, microstructural and Mössbauer studies of nanocrystalline Fe_100-xAl_xpowders elaborated by mechanical alloying

Boukherroub

Guittoum

Souami

et al. 2012

EPJ Web of Conferences

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Abstract. Nanocrystalline Fe 100-x Al x powders (x= 25, 30, 34 and 40 at %) were prepared by the mechanical alloying process using a vario-planetary high-energy ball mill for a milling time of 35 h. The formation and physical properties of the alloys were investigated as a function of Al content by means of X-ray diffraction, scanning electron microscopy (SEM), energy dispersive X-ray and Mössbauer spectroscopy. For all Fe 100-x Al x samples, the complete formation of bcc phase was observed after 35 h of milling. As Al content increases, the lattice parameter increases, whereas the grain size decreases from 106 to 12 nm. The powder particle morphology for different compositions was observed by SEM. The Mössbauer spectra were adjusted with a singlet line and a sextet containing two components. The singlet was attributed to the formation of paramagnetic A2 disordered structure rich with Al. About the sextet, the first component indicated the formation of Fe clusters/ Fe-rich phases; however, the second component is characteristic of disordered ferromagnetic phase.

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Magnetic properties and thermal ordering of mechanically alloyed Fe–40at% Al

Cited by 89 publications

References 50 publications

Structural characterization of mechanically alloyed nanocrystalline Cu-Fe: Strain broadening due to dislocations

Structural characterization of mechanically alloyed nanocrystalline Cu-Fe: Strain broadening due to dislocations

Electronic structure of FeAl alloy studied by resonant photoemission spectroscopy and Ab initio calculations

Structural, microstructural and Mössbauer studies of nanocrystalline Fe_100-xAl_xpowders elaborated by mechanical alloying

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Magnetic properties and thermal ordering of mechanically alloyed Fe–40at% Al

Cited by 89 publications

References 50 publications

Structural characterization of mechanically alloyed nanocrystalline Cu-Fe: Strain broadening due to dislocations

Structural characterization of mechanically alloyed nanocrystalline Cu-Fe: Strain broadening due to dislocations

Electronic structure of FeAl alloy studied by resonant photoemission spectroscopy and Ab initio calculations

Structural, microstructural and Mössbauer studies of nanocrystalline Fe100-xAlxpowders elaborated by mechanical alloying

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Structural, microstructural and Mössbauer studies of nanocrystalline Fe_100-xAl_xpowders elaborated by mechanical alloying