Characterization of Al65.0Cu32.9Co2.1 Alloy Containing Nanofibres

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Abstract:

Microstructure of terminal area of Al65Cu32.9Co2.1 ingots (numbers indicate at.%), obtained via directional solidification was studied. Scanning Electron Microscopy, Transmission Electron Microscopy and X-ray powder diffraction were applied. Point microanalysis by Scanning Electron Microscope was used for examination of chemical compositions of alloy phases. It was found that tetragonal θ phase of Al2Cu stoichiometric formula was the dominate phase (matrix). Additionally the alloy contained orthogonal set of nanofibres of Al7Cu2Co T phase with the average diameter of 50-500 nm and oval areas of hexagonal Al3(Cu,Co)2 H-phase, surrounded by monoclinic AlCu η1 phase rim. Inside some areas of H-phase cores of decagonal quasicrystalline D phase were observed.

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Solid State Phenomena (Volume 186)

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212-215

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March 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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