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The Dy-Zn phase diagram

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Abstract

The dysprosium-zinc phase diagram has been investigated over its entire composition range by using differential thermal analysis, (DTA) metallographic analysis, X-ray powder diffraction, and electron probe microanalysis (EPMA). Seven intermetallic phases have been found and their structures confirmed. DyZn, DyZn2, Dy13Zn58, and Dy2Zn17 melt congruently at 1095 °C, 1050 °C, 930 °C, and 930 °C, respectively. DyZn3, Dy3Zn11, and DyZn12 form through peritectic reactions at 895 °C, about 900 °C and 685 °C, respectively. Four eutectic reactions occur at 850 °C and 30.0 at pct Zn (between (Dy) and DyZn), 990 °C and 60.0 at pct Zn (between DyZn and DyZn2), 885 °C and 76.0 at pct Zn (between DyZn3 and Dy3Zn11), and 875 °C and 85.0 at pct Zn (involving Dy13Zn58 and Dy2Zn17). The Dy-rich end presents a catatectic equilibrium; a degenerate invariant effect has been found in the Zn-rich region. The phase equilibria of the Dy-Zn alloys are discussed and compared with those of the other known RE-Zn systems (RE=rare earth metal) in view of the regular change in the relative stabilities of the phases across the lanthanide series

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Authors and Affiliations

  1. the Department of Chemistry, University of Genova, 31 I-16146, Genova, Italy

    A. Saccone (Full Professor), S. Delfino (Full Professor), A. M. Cardinale (Researcher) & R. Ferro (Professor Emeritus)

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  1. A. Saccone
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  2. S. Delfino
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  3. A. M. Cardinale
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  4. R. Ferro
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Saccone, A., Delfino, S., Cardinale, A.M. et al. The Dy-Zn phase diagram. Metall Mater Trans A 34, 743–750 (2003). https://doi.org/10.1007/s11661-003-0109-x

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