Yb(Cu,T) 5 and Yb(Cu,T) 4.5 solid solutions (T = Ag, Au, Pd)

The binary Yb–Cu phase diagram was re-investigated in the Cu-rich part. Starting from this region, solid solutions formed by substitution of Cu by Ag, Au, and Pd have been investigated by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). A co...

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Bibliographic Details
Published in:Intermetallics 2008-03, Vol.16 (3), p.399-405
Main Authors: Giovannini, M., Pasero, R., De Negri, S., Saccone, A.
Format: Article
Language:English
Subjects:
A. Rare-earth intermetallics
B. Crystal chemistry of intermetallics
F. Diffraction
F. Electron microscopy, scanning
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Summary:The binary Yb–Cu phase diagram was re-investigated in the Cu-rich part. Starting from this region, solid solutions formed by substitution of Cu by Ag, Au, and Pd have been investigated by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). A competition in compound formation between Yb(Cu,T) 5 (T = Ag, Au, Pd), cubic AuBe 5-type and its monoclinic superstructure Yb(Cu,T) 4.5 is generally evident. Whereas for Cu/Au and Cu/Ag substitutions deeply-extended Yb(Cu,T) 5 solid solutions are formed, in the case of substitution of Cu by Pd the cubic and monoclinic phases coexist.
ISSN:0966-9795
1879-0216
DOI:10.1016/j.intermet.2007.11.010