Synthesis of quasicrystalline phase during mechanical alloying of Al70Cu20Fe10

Barua, P. ; Srinivas, V. ; Murty, B. S. (2000) Synthesis of quasicrystalline phase during mechanical alloying of Al70Cu20Fe10 Philosophical Magazine A, 80 (5). pp. 1207-1217. ISSN 0141-8610

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Official URL: http://www.tandfonline.com/doi/abs/10.1080/0141861...

Related URL: http://dx.doi.org/10.1080/01418610008212111

Abstract

An icosahedral phase (i-phase) has been synthesized by mechanical alloying of an elemental blend of Al70Cu20Fe10. Mechanical alloying of Al and Fe in the stoichiometric ratio of 3:1 and continued milling after the addition of Al and Cu to yield the nominal composition of Al70Cu20Fe10 does not result in the i-phase formation which requires subsequent annealing at 600°C for 4h for its formation. A single i-phase cannot be obtained even after annealing. In all cases, an Al(Cu, Fe) solid solution (β phase) has been found along with the i-phase. The i-phase appears to form by a peritectoid type of reaction between the β phase and Al2Cu. The electrical resistivity of the nanocrystalline i-phase obtained in the present study was found to be about 2-3 orders higher than that found in thin films and it shows semiconducting behaviour.

Item Type:Article
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ID Code:73376
Deposited On:02 Dec 2011 08:00
Last Modified:02 Dec 2011 08:00

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