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High pressure induced crystallization of rapidly solidified Al---Fe and Al---Mn quasi-crystalline alloysstar

Gopal, ESR and Baranidharan, S and Sekhar, JA (1988) High pressure induced crystallization of rapidly solidified Al---Fe and Al---Mn quasi-crystalline alloysstar. In: Materials Science and Engineering, 99 (1-2). pp. 413-416.

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Abstract

The presence of phases showing icosahedral point symmetry was reported by Shechtman, Blech, Gratias and Cahn in rapidly quenched alloys of Al---Mn, Al---Fe and Al---Cr, and subsequently many other splat-cooled alloys with the i phase have been reported. In this paper we present the first results of high pressure experiments carried out on Al---Fe and Al---Mn quasi-crystals. The experiments performed at room temperature showed irreversible quasi-crystal-to-crystal transitions in Al---Mn and Al---Fe alloys. The transition pressures are 49 kbar for Al78Mn22, 93 kbar for Al86Mn14, 79 kbar for Al86Fe14, 54 kbar for Al82Fe18 and 108 kbar for Al75Fe25. The high pressure phases are found to be the equilibrium phases.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 12 Aug 2009 05:10
Last Modified: 19 Sep 2010 05:39
URI: http://eprints.iisc.ernet.in/id/eprint/21977

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