Spontaneous formation of the B2 phase from a decagonal quasicrystal under reduced constraint

Kim, S. H.; Chattopadhyay, K.; Inkson, B. J.; Möbus, Günter; Kim, W. T.; Kim, D. H.

doi:10.1007/s10853-006-0668-5

Cited by 3 publications

(1 citation statement)

References 20 publications

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“…The indentation response at micro and nano scale has been reviewed in order to bring out some interesting features characteristic to deformation of QCs52 During compression tests, Kang and Dubois53 observed the formation of a rhombohedral phase (whose atomic positions were similar to those in Al 3 Ni 2 type structure and alternately can be described as B2‐based cubic phase, a =0.83 nm) and Al 13 Fe 4 during mechanical deformation Al‐Fe‐Cu QC. There are reports of the phase transformation in QC during scratching,54 cracking,55 and indentation tests 56. 57 Wu et al 54.…”

Section: Stability Of Quasicrystals Under Externally Driven Conditmentioning

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: Stability Of Quasicrystals Under Externally Driven Conditmentioning

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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Strain-induced structural transformation of single-phase Al–Cu–Fe icosahedral quasicrystal during mechanical milling

Mukhopadhyay

Ali

Srivastava

et al. 2011

Philosophical Magazine

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Inverse Hall-Petch Like Mechanical Behaviour in Nanophase Al-Cu-Fe Quasicrystals: A New Phenomenon

et al. 2014

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The structural and mechanical stability of quasicrystals are important issues due to their potential for possible applications at high temperatures and stresses. The aim of the present work is, therefore, to review the earlier works on conventional crystalline and quasicrystalline materials and also to report the results and the analysis on the HallPetch and inverse HallPetch like behavior of nanoquasicrystalline Al62.5Cu25Fe12.5 alloys. It was observed that, at large grain sizes, the hardness increases with decreasing grain size, exhibiting the conventional HallPetch relationship, whereas for smaller grains, inverse HallPetch behavior was identied. The inverse Hall Petch behavior in the nanoquasicrystalline phase could be attributed to thermally activated shearing of the grain boundaries, leading to grain boundary sliding in nanostructures of quasicrystalline grains. These results were analyzed based on the dislocation pile-up model as well as the grain boundary shearing models applicable to nanomaterials.

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Spontaneous formation of the B2 phase from a decagonal quasicrystal under reduced constraint

Cited by 3 publications

References 20 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

Strain-induced structural transformation of single-phase Al–Cu–Fe icosahedral quasicrystal during mechanical milling

Inverse Hall-Petch Like Mechanical Behaviour in Nanophase Al-Cu-Fe Quasicrystals: A New Phenomenon

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