Isothermal section of the Er–Fe–Al ternary system at 800 °C

• Published in: Journal of alloys and compounds 2010-01, Vol.489 (2), p.421-423
• Main Authors: Jemmali, M., Walha, S., Pasturel, M., Tougait, O., Ben Hassen, R., Noël, H.
• Format: Article
• Language: English
• Subjects: Chemical Sciences; Cross-disciplinary physics: materials science; rheology; Erbium; Exact sciences and technology; Intermetallics; Material chemistry; Materials science; Phase diagram; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Phase diagrams of metals and alloys; Physics; Rare earth
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2009.09.152

Physico-chemical analysis techniques, including X-ray diffraction and Scanning Electron Microscope–Energy Dispersive X-ray Spectroscopy, were employed to construct the isothermal section of the Er–Fe–Al system at 800 °C. At this temperature, the phase diagram is characterized by the formation of five intermediate phases, ErFe 12− x Al x with 5 ≤ x ≤ 8 (ThMn 12-type), ErFe 1+ x Al 1− x with −0.2 ≤ x ≤ 0.75 (MgZn 2-type), ErFe 3− x Al x with 0.5 < x ≤ 1 (DyFe 2Al-type), Er 2Fe 17− x Al x with 4.74 ≤ x ≤ 5.7 (TbCu 7-type) and Er 2Fe 17− x Al x with 5.7 < x ≤ 9.5 (Th 2Zn 17-type), seven extensions of binaries into the ternary system; ErFe x Al 3− x with x < 0.5 (Au 3Cu-type), ErFe x Al 2− x with x ≤ 0.68 (MgCu 2-type), Er 2Fe x Al 1− x with x ≤ 0.25 (Co 2Si-type), ErFe 2− x Al x with x ≤ 0.5 (MgCu 2-type), ErFe 3− x Al x with x ≤ 0.5 (Be 3Nb-type), Er 6Fe 23− x Al x with x ≤ 8 (Th 6Mn 23-type), and Er 2Fe 17− x Al x with x ≤ 4.75 (Th 2Ni 17-type) and one intermetallic compound; the ErFe 2Al 10 (YbFe 2Al 10-type).