Al-Cu-Fe QUASICRYSTALLINE PHASE FORMATION BY MECHANICAL ALLOYING

Al-Cu-Fe alloys were prepared from elemental powders in a high-energy planetary ball mill. A sequence of solid state reactions resulting in quasicrystal (QC) phase formation takes place during heating of the as-milled powder. These reactions were studied by both differential scanning calorimetry and...

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Bibliographic Details
Published in:Materials and manufacturing processes 2002-11, Vol.17 (6), p.825-841
Main Authors: Tcherdyntsev, V. V., Kaloshkin, S. D., Salimon, A. I., Leonova, E. A., Tomilin, I. A., Eckert, J., Schurack, F., Rogozin, V. D., Pisarev, S. P., Trykov, Yu. P.
Format: Article
Language:English
Subjects:
Al-Cu-Fe quasicrystals
Bulk samples
Mechanical alloying
Phase transformations
Porosity
Powder consolidation
Solid state reaction
Vickers hardness
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Summary:Al-Cu-Fe alloys were prepared from elemental powders in a high-energy planetary ball mill. A sequence of solid state reactions resulting in quasicrystal (QC) phase formation takes place during heating of the as-milled powder. These reactions were studied by both differential scanning calorimetry and x-ray diffraction methods. Mechanically alloyed powders were consolidated by cold and hot pressing, as well as by explosive compaction. After annealing at sufficiently high temperatures, the consolidated samples are single-phase QC, except the ones consolidated by explosion. The high reactivity of the as-milled alloys causes the appearance of high porosity of the consolidated samples after the annealing.
ISSN:1042-6914
1532-2475
DOI:10.1081/AMP-120016060