[Kovove materialy - Metallic materials]
    Thu - March 28, 2024 - 20:00 No. of hits : 1736466 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 44 (2006), Issue 6

Microstructure characterisation of Al65Cr28Fe7 quasicrystalline approximant
JANOVEC, J., SVOBODA, M., DOLINSEK, J., GODEC, M., BURSIK, J., DUSZA, J.
vol. 44 (2006), no. 6, pp. 313 - 320

Abstract
The microstructure characterisation of the quasicrystalline approximant Al65Cr28Fe7 was performed by transmission electron microscopy, electron diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, and other methods. In the investigated sample, two phases were identified: the metallic matrix possessing hexagonal structure with lattice parameters a = 1.2728 nm and c = 0.7942 nm (isostructural with the gamma-brass) and Al2O3 in the form of inclusions. The microstructure of the approximant was found to be formed by grains (their interior consists of plain and lamellate areas) surrounded by heterogeneous areas rich on the Al2O3 inclusions. The lamellate areas were found to be formed by parallel bands. Every other band showed the same orientation. In the band boundaries, the dislocation networks were found. It was shown that two sets of dislocations oriented nearly perpendicular to each other form dislocation networks also inside the bands.

Key words
quasicrystalline approximant, substructure, transmission electron microscopy

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.


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