Rational Approximant Structures and Phason Strain in Icosahedral Quasicrystalline Phases

Mukhopadhyay, NK and Ishihara, KN and Ranganathan, S and Chattopadhyay, K (1991) Rational Approximant Structures and Phason Strain in Icosahedral Quasicrystalline Phases. In: Acta Metallurgica et Materialia, 39 (6). pp. 1151-1159.

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Abstract

The degeneracy of the reciprocal space with respect to the icosahedral symmetry has been demonstrated by experimental diffraction patterns obtained from rapidly solidified A1-Mn-Si, Mg-A1-Ag, Mg-AI-Zn alloys. The distortion in diffraction patterns has been attributed to rational approximant (RA)structures. The distorted pattern obtained from Mg-A1-Zn system has been indexed based on 3/2 RA structure. The shift parameter has been quantified and shown to vary linearly with the pseudospace counterpart of the corresponding quasicrystalline reciprocal vector, which is the characteristic feature of phason strain.

Item Type:	Journal Article
Publication:	Acta Metallurgica et Materialia
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	11 Oct 2006
Last Modified:	19 Sep 2010 04:31
URI:	http://eprints.iisc.ac.in/id/eprint/8469

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