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Quasi Crystalline A1-Mn Alloys: Pressure Induced Crystallization and Structural Studies

Parthasarathy, G and Gopal, ESR and Krishnamurthy, HR and Pandit, R and Sekhar, JA (1986) Quasi Crystalline A1-Mn Alloys: Pressure Induced Crystallization and Structural Studies. In: Current Science, 55 (11). pp. 517-520.

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Official URL: http://www.ias.ac.in/jarch/currsci/55/00000546.pdf

Abstract

Irreversible, Pressure induced, quasicrystal-to-crystal transitions are observed for the first time in melt spun alloys at 4.9 GPa for Al 78 Mn22 and 9.3 GPa for Al86 Mn14 by monitoring the electrical resistivities of these alloys as a function of pressure. Electron diffraction and x-ray measurements are used to show that these quasicrystalline phases have icosohedral point group symmetry. The crystalline phases which appear at high pressures are identified as h.c.p. for Al78 Mn22 and orthorhombic for Al86 Mn14.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation and Applied Physics (Formally ISU)
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 02 Feb 2010 07:16
Last Modified: 02 Feb 2010 07:16
URI: http://eprints.iisc.ernet.in/id/eprint/21795

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