I. A. Blech’s research while affiliated with Technion – Israel Institute of Technology and other places

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Publications (3)


Microstructure of rapidly solidified Al6Mn
  • Article

June 1985

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110 Reads

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382 Citations

Metallurgical and Materials Transactions A

D. Shechtman

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I. A. Blech

The microstructure of rapidly solidified Al−Mn alloys containing 18 to 25.3 wt pct Mn was studied by transmission electron microscopy. One of the phases found in the microstructure exhibits icosahedral symmetry manifested in electron diffraction patterns having five-fold symmetry. A new structural concept is proposed to account for the observed electron diffraction patterns. The structure is assumed to be composed of many connected polyhedra. Although not forming a regular lattice, such structures are able to produce sharp diffraction peaks. The terminal stability and transformation of the icosahedral phase was also studied and reported.


Metalic Phase With Long-Range Orientational Order and No Translational Symmetry
  • Article
  • Full-text available

November 1984

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1,853 Reads

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6,913 Citations

Physical Review Letters

A metallic solid (Al-14-at. pct.-Mn) with long-range orientational order, but with icosahedral point group symmetry, which is inconsistent with lattice translations, has been observed. Its diffraction spots are as sharp as those of crystals but cannot be indexed to any Bravais lattice. The solid is metastable and forms from the melt by a first-order transition.

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Citations (3)


... [5] Quasicrystals are a class of solid materials that exhibit long-range order without periodic repetition. First identified in 1982 by Dan Shechtman, [6] their discovery challenged the prevailing assumption that atomic arrangements in crystals must repeat regularly in space. Quasicrystals display symmetry, such as fivefold rotations, that are forbidden in classical crystallography, yet their structure is neither random nor disordered. ...

Reference:

Language Models as Quasi-Crystalline Thought: Structure, Constraint, and Emergence in Generative Systems
Metallic phase with long-range orientation order and no translational symmetry
  • Citing Article
  • January 1984

Physical Review Letters

... Quasicrystals (QCs) are aperiodic structures characterized by discrete diffraction patterns. Initially explored as a mathematical concept [1,2], they were eventually discovered in metallic alloys in the 1980s [3,4], prompting a redefinition of the very concept of crystal [5]. Besides exploration within condensed matter systems [6][7][8][9][10][11], quasicrystalline order has since been observed across a wide range of materials. ...

Metalic Phase With Long-Range Orientational Order and No Translational Symmetry

Physical Review Letters

... Quasicrystal (QC), which is a class of arrangements of atoms only with long-range orientation but without translational symmetry, has been intensively studied since its first discovery in the Al-Mn alloy by Shechtman et al. [21,22] The lack of periodicity in QCs gives rise to unique electronic states, which have continued to be fascinating research topics for more than 40 years since their discovery. Moreover, QCs have phason distortion [23,24] as well as phonon distortion, which could offer a platform of a variety of anomalous thermodynamic effects [25,26], structural transitions [27][28][29], and lattice dynamics [30,31]. ...

Microstructure of rapidly solidified Al6Mn
  • Citing Article
  • June 1985

Metallurgical and Materials Transactions A