High energy ball milling of a Al65Cu20Fe15 quasicrystalline alloy

Mukhopadhyay, N. K.; Kurup, Vinod; Srivastava, V. C.; Joshi, P. B.; Mandal, R.K.

doi:10.1016/j.jnoncrysol.2003.11.012

Cited by 14 publications

(5 citation statements)

References 17 publications

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“…The mechanical milling (MM) of Al‐Cu‐Fe IQC has been studied by Mukhopadhyay et al 95. 96 using the attritor ball mill, and the formation of B2 phase and amorphous phase after milling (Figure 5) was observed. Subsequently, Yadav et al 97.…”

Section: Mechanical Alloying/milling Of Quasicrystals By High‐enermentioning

confidence: 99%

Some Aspects of Stability and Nanophase Formation in Quasicrystals during Mechanical Milling

Mukhopadhyay

Yadav

2011

Israel Journal of Chemistry

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Non‐equilibrium processing and other related techniques can activate quasicrystalline structures to a higher energy level and enable them to attain various stable/metastable structures. During mechanical milling of quasicrystalline alloys, the stability of the complex structures is of immense importance from a scientific and technological point of view. The evolution of nanoquasicrystalline, nanocrystalline, and amorphous phases and their composites has been observed in the course of milling. The experimental results for mechanical alloying of elemental powders (required for the synthesis of quasicrystals) and mechanical milling of quasicrystals are discussed. The salient features observed in quasicrystals during other non‐equilibrium processing are highlighted. Nanospinel formation from the Al‐based quasicrystalline precursor is mentioned.

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Section: Mechanical Alloying/milling Of Quasicrystals By High‐enermentioning

confidence: 99%

Some Aspects of Stability and Nanophase Formation in Quasicrystals during Mechanical Milling

Mukhopadhyay

Yadav

2011

Israel Journal of Chemistry

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“…Up to now, QC phases have been observed in more than 100 alloy systems. Among them, Al-Cu-Fe alloys [10][11][12][13][14][15][16][17] have received a particular attention due to their lack of toxicity, easy availability and the favourable costs of their alloying elements. Interestingly, most of these studies are restricted to the Al 65 Cu 20 Fe 15 composition.…”

Section: Introductionmentioning

confidence: 99%

Quasicrystalline phase formation during heat treatment in mechanically alloyed Al₆₅Cu₂₀Fe₁₅ alloy

Göğebakan

Avar

2010

Materials Science and Technology

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Quasicrystalline phase formation during heat treatment in the mechanically alloyed Al65Cu20Fe15 powders was studied by X-ray diffraction (XRD) and differential scanning calorimeter (DSC). The mechanical alloying was performed at speed of 300 rev min–1 for times up to 70 h. It was found that mechanical alloying of the Al65Cu20Fe15 powders did not result in the quasicrystalline (QC) icosahedral phase (i-phase) formation. The long time milling resulted in the formation of a cubic Al (Cu,Fe) solid solution phase ( β-phase). The cubic Al (Cu,Fe) solid solution identified as β-phase was observed to be present as one of the major phases in the Al65Cu20Fe15 alloy. The formation of the quasicrystalline icosahedral phase (i-phase) was only observed for short time milled powders after additional annealing at temperature above 500°C. The present investigation also showed that a tetragonal Al2Cu phase ( θ-phase) forms with short time milling. The tetragonal Al7Cu2Fe1 phase (w-phase) was observed after heat treatment of the short time milled and unmilled powders. The present investigation indicated that an effective process to prepare the quasicrystalline materials was using a combination of short time milling and subsequent annealing.

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“…Sin embargo, no se descarta la posibilidad de que a 60 horas de molienda se empiece a formar una nueva fase, esto se induce por la presencia de un pequeño pico de difracción a 43 • . Se sabe que las fases cristalinas como Al13Fe4, Al2Cu y Al(Cu,Fe), afines a las fases cuasicristalinas, presentan sus picos máximos de intensidad entre las posiciones angulares 42 • -45 • junto a las fases cuasicristalinas y son reportadas frecuentemente en la lite-ratura [12][13][14]. Asimismo, Nasu y colaboradores [15] reportaron una transición de la fase cuasicristalina Al65Cu20Fe15 a una fase amorfa después de 200 horas de molienda en un molino convencional de billas.…”

Section: Resultados Y Discusiónunclassified

Estudio de la evolución estructural y μestructural del cuasicristal i-Al64Cu23Fe13 sometido a procesos de molienda mecánica

Pillaca

Landauro

2012

Rev. Inv. Fis.

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En el presente trabajo se realiza un estudio sistemático, mediante difracción de rayos X y espectroscopia Mössbauer, de la variación de los parámetros estructurales e hiperfinos durante el proceso de molienda mecánica del cuasicristal icosaédrico Al64Cu23Fe13. Para tal fin, las muestras fueron preparadas con la técnica de horno de arco voltaico y sometidos luego a un tratamiento térmico. Posteriormente, las muestras fueron nanoestructuradas en un molino vibratorio de alta energía durante 5, 10, 15, 20, 45, 50 y 60 horas. Los resultados de difracción de rayos X muestran la estabilidad de las muestras nanoestructuradas. Asimismo, los espectros Mössbauer indican el incremento de los sitios de hierro en las fronteras de grano debido al proceso de molienda.

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High energy ball milling of a Al65Cu20Fe15 quasicrystalline alloy

Cited by 14 publications

References 17 publications

Some Aspects of Stability and Nanophase Formation in Quasicrystals during Mechanical Milling

Some Aspects of Stability and Nanophase Formation in Quasicrystals during Mechanical Milling

Quasicrystalline phase formation during heat treatment in mechanically alloyed Al₆₅Cu₂₀Fe₁₅ alloy

Estudio de la evolución estructural y μestructural del cuasicristal i-Al64Cu23Fe13 sometido a procesos de molienda mecánica

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High energy ball milling of a Al65Cu20Fe15 quasicrystalline alloy

Cited by 14 publications

References 17 publications

Some Aspects of Stability and Nanophase Formation in Quasicrystals during Mechanical Milling

Some Aspects of Stability and Nanophase Formation in Quasicrystals during Mechanical Milling

Quasicrystalline phase formation during heat treatment in mechanically alloyed Al65Cu20Fe15 alloy

Estudio de la evolución estructural y μestructural del cuasicristal i-Al64Cu23Fe13 sometido a procesos de molienda mecánica

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Quasicrystalline phase formation during heat treatment in mechanically alloyed Al₆₅Cu₂₀Fe₁₅ alloy