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Quasicrystals and their crystalline homologues in the Al-Mn-Cu ternary alloys

Tendeloo, van G and Singh, Alok and Ranganathan, S (1991) Quasicrystals and their crystalline homologues in the Al-Mn-Cu ternary alloys. In: Philosophical Magazine A & B, 64 (2). 413 -427.

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Abstract

Electron diffraction and high-resolution electron microscopy have been employed to differentiate among icosahedral, decagonal and crystalline particles that occur in as-cast and rapidly solidified Al-Mn-Cu alloys. The resemblance between decagonal quasicrystals and crystals in their electron diffraction patterns is striking. The crystalline structure is based on the orthorhombic 'Al3Mn' structure, but also a new monoclinic phase called 'X' has been discovered and described here. The present observations are also closely related to the orthorhombic structures in Al60Mn11Ni4. The occurrence of fine-scale twinning and fragmentation into domains explains the complex diffraction effects.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Taylor and Francis Group.
Keywords: Decagonal Phase;Electron-Microscopy;Icosahedral Phases;Quasi-Crystals;Tenfold Twins;Diffraction;Symmetry;Pd.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 30 Nov 2010 07:57
Last Modified: 30 Nov 2010 07:57
URI: http://eprints.iisc.ernet.in/id/eprint/34062

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