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Title: Stability and phase transition in Al₆₅Cu₂₀Co₁₅₋xFex (0≤x≤15) quasi-crystalline systems
Authors: Singh, K
Bahadur, D
Keywords: Quasicrystals;X-ray diffraction;Differential thermal analysis;Fermi wave vector
Issue Date: Jul-2008
Publisher: CSIR
Abstract: The samples Al₆₅Cu₂₀Co₁₅₋xFex (0≤x≤15), Al₆₃Cu₂₅Fe₁₂ and Al60Cu₂₀Fe₁₅Si₅ have been synthesized. Their stability and formed phases are investigated using differential thermal analysis (DTA) and X-ray diffraction (XRD), respectively. The maximum stability in alloys is found when the Fermi wave vector, kF satisfies the relation KP = 2kF. Apart from this, specific range of e/a (electron per atom) and atomic size ratio of constituents also play an important role in forming the thermodynamically stable quasicrystals.
Page(s): 497-501
ISSN: 0019-5596
Appears in Collections:IJPAP Vol.46(07) [July 2008]

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