Electron Microscopy of Quasi-Crystals and Related Structures

Chattopadhyay, K and Lele, S and Ranganathan, S and Subbanna, GN and Thangaraj, N (1985) Electron Microscopy of Quasi-Crystals and Related Structures. In: Current Science, 54 (18). pp. 895-903.

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Abstract

Systematic electron microscopy of quasi crystals in an A1-14 at \% Mn alloy has been carried out. High resolution imaging reveals fringes with spacings in the ratio of 1:\tau. Besides 5-3-2 synnetry axes, other important zones of electron diffraction patterns are experimentally determined and compared with those generated by Landau grneration technique and by projection technique. It has been shown that the 'T' phase, which often co-exits with quasicrystal, is closely related to it and can be treated as a two dimensional quasiperiodic crystal stacked periodically along an icosahedral vector of a true quasi periodic incommensurate modulation in three, two and one dimensions. The quasi crystal, the 'T' phase and vacancy ordered \tau phases and the respective real life examples of such modulations.

Item Type:	Journal Article
Publication:	Current Science
Publisher:	Indian Academy of Sciences
Additional Information:	Copyright of this article belongs to Indian Academy of Sciences.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	28 Jul 2008
Last Modified:	19 Sep 2010 04:47
URI:	http://eprints.iisc.ac.in/id/eprint/14854

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