Influence of boron content on the microstructure of sintered Al62.5−xCu25.3Fe12.2Bx alloys (x = 0, 3, 5)

• Published in: Journal of materials research Vol. 19; no. 10; pp. 2974 - 2980
• Main Authors: Brien, V., Khare, V., Herbst, F., Weisbecker, P., Ledeuil, J-B., de Weerd, M.C., Machizaud, F., Dubois, J-M.
• Format: Journal Article
• Language: English
• Published: New York, USA Cambridge University Press 01.10.2004
• Subjects: Microstructure; Quasicrystal; Solidification; Microstructure; Quasicrystal; Solidification
• ISSN: 0884-2914; 2044-5326
• DOI: 10.1557/JMR.2004.0366

Microstructures and morphological features of a series of sintered quasicrystalline Al62.5−xCu25.3Fe12.2Bx alloys, with x ranging from 0 to 5 at.% were studied using x-ray diffraction, scanning electron microscopy, x-ray mapping, and electron probe microanalysis. Electron backscattering diffraction (EBSD) was also used to get information about the structures of some phases and identify the crystalline relationship in-between phases. Increasing x results in the change of the nature of extra phases. These secondary phases are all less than 1% in volume of the total matter except for the β phase at 5% of boron. Whatever the percentage of boron considered, boron seems to concentrate essentially in the parasite phases confirming doubts found in literature about the solubility of boron inside the face-centered-icosahedral Al–Cu–Fe phase. No special crystallographic relationship in between the tested phases could be spotted. EBSD is thus also confirmed as an excellent technique to get quasicrystalline grains orientations.