Formation and magnetic properties of mechanically alloyed Al65Cu20Fe15 quasicrystal

Roy, M.

doi:10.1016/j.jmmm.2005.08.021

Cited by 20 publications

(6 citation statements)

References 18 publications

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“…Typical lower resistivity at room temperature are in the range ρ≈10 2 -10 3 μΩcm for quasicrystals decagonal and icosahedral with ρ≈10 3 -10 6 μΩcm. however, compared to the resistivity of aluminum metal which ρ (77k) =0,3μΩcm 8 . The resistivity of the quasicrystals and the remaining orders of magnitude lower than that seen in the insulation so that the quasicrystals can be generally considered as weak metals or semimetals.…”

Section: Epr Spectroscopic Study Of Al 63 Cu 25 Fe 12 Quasicrystal Inmentioning

confidence: 99%

Characterizations and Electron Paramagnetic Resonance (Epr) Quasicrystals in an Icosahedral Phase

Jamshi

Rodbari

Nascimento

2018

J. Chil. Chem. Soc.

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This article deals with a study on the icosahedral phase quasicrystal of Al 63 Cu 25 Fe 12 produced by casting in plasma induction furnace under an argon atmosphere to guarantee it's homogenously. But found in phase transformations from one phase to another, the structures formed by the quasicrystalline alloy having ordered icosahedral phase, leads to low electrical conductivity; but considering the location of weak electron-electron interactions. For microstructural characterization was made using the Following techniques; X-ray Diffraction, Scanning Electron Microscopy, Energy Dispersive Spectroscopy of, DSC Thermal Analysis and Spectroscopy Electron Paramagnetic Resonance (EPR), where the spectrum Obtained experimental EPR presents an amount of resonance g = 2,036. EPR spectrum provide a detailed view of magnetic equivalent sites to those of paramagnetic transition metal compositional variation in the alloy quasicrystalline and transition temperature effects on the magnetic spins in the sample ordering.

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Section: Epr Spectroscopic Study Of Al 63 Cu 25 Fe 12 Quasicrystal Inmentioning

confidence: 99%

Characterizations and Electron Paramagnetic Resonance (Epr) Quasicrystals in an Icosahedral Phase

Jamshi

Rodbari

Nascimento

2018

J. Chil. Chem. Soc.

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“…Several reports have been published on the formation of icosahedral QC phase by MM/MA subsequently annealing in Al-Cu-Fe system [160][161][162][163][164][165][166][167][168][169]. These alloys in the MA state contain a β(CsCl_type) solid solution along with icosahedral phase [170].…”

Section: Icosahedral Phasementioning

confidence: 99%

Mechanical Milling: a Top Down Approach for the Synthesis of Nanomaterials and Nanocomposites

Yadav¹,

Yadav²,

Singh³

2012

532

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Synthesis of nanomaterials by a simple, low cost and in high yield has been a great challenge since the very early development of nanoscience. Various bottom and top down approaches have been developed so far, for the commercial production of nanomaterials. Among all top down approaches, high energy ball milling, has been widely exploited for the synthesis of various nanomaterials, nanograins, nanoalloy, nanocomposites and nano -quasicrystalline materials. Mechanical alloying techniques have been utilized to produce amorphous and nanocrystalline alloys as well as metal/non-metal nanocomposite materials by milling and post annealing, of elemental or compound powders in an inert atmosphere. Mechanical alloying is a non-equilibrium processing technique in which different elemental powders are milled in an inert atmosphere to create one mixed powder with the same composition as the constituents. In high-energy ball milling, plastic deformation, cold-welding and fracture are predominant factors, in which the deformation leads to a change in particle shape, cold-welding leads to an increase in particle size and fracture leads to decrease in particle size resulting in the formation of fine dispersed alloying particles in the grain-refined soft matrix. By utilizing mechanical milling various kind of aluminium/ nickel/ magnesium/ copper based nanoalloys, wear resistant spray coatings, oxide and carbide strengthened aluminium alloys, and many other nanocomposites have been synthesized in very high yield. The mechanical milling has been utilized for the synthesis of nanomaterials either by milling and post annealing or by mechanical activation and then applying some other process on these activated materials. This review is a systematic view of the basic concept of mechanical milling, historical view and applications of mechanical milling in the synthesis of various nanomaterials, nanosomposites, nnaocarbons and nano quasicrystalline materials.

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“…Eles se constituem em uma classe intermediária entre os materiais amorfos e os cristalinos, quanto ao grau e característica de ordenamento, pois um quasicristal pode ser relacionado como constituído de aglomerados icosaédricos de átomos metálicos, todos orientados da mesma forma, e separados por quantidades variáveis de materiais desordenados, estas características dos quasicristais são bem distintas em relação às características dos metais convencionais [3]. Quasicristais são termodinamicamente estáveis e metaestáveis existem, na maioria, na forma de ligas ternárias (AlPdMn, AlCuFe, AlCuRu, etc.)…”

Section: Introductionunclassified

PROPRIEDADES ELETRÔNICAS DA LIGA QUASICRISTALINA AlCuFe

Nascimento¹

2017

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Este trabalho tem como objetivo principal mostrar um estudo sobre o comportamento da liga quasicristalina AlCuFe com relação às suas propriedades estruturais e eletrônicas. Com relação às propriedades estruturais foi dado ênfase aos padrões de difração de raios X e por evolução microestrutural pela a microscopia eletrônica de varredura. O estudo das propriedades eletrônicas seguiu a seqüência de Fibonacci para determinar os espectros eletrônicos da liga estudada. Foi mostrado que as propriedades eletrônicas destas, representam sistemas intermediários entre ordem e desordem, em relação sequência

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Formation and magnetic properties of mechanically alloyed Al65Cu20Fe15 quasicrystal

Cited by 20 publications

References 18 publications

Characterizations and Electron Paramagnetic Resonance (Epr) Quasicrystals in an Icosahedral Phase

Characterizations and Electron Paramagnetic Resonance (Epr) Quasicrystals in an Icosahedral Phase

Mechanical Milling: a Top Down Approach for the Synthesis of Nanomaterials and Nanocomposites

PROPRIEDADES ELETRÔNICAS DA LIGA QUASICRISTALINA AlCuFe

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