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Section III: Supplemental Literature Review

Dy-Sn (Dysprosium-Tin) H. Okamoto

The Dy-Sn phase diagram in [Massalski2] was updated by [1993Oka] primarily based on the works of [1983Che] and [1992Ere]. The [1993Oka] diagram was updated further by [1995Oka] as [1993Pal] investigated systematic trends of RE-Sn systems in the range 60-100 at.% Sn. The dashed line in Fig. 1 shows liquidus boundaries of the [1995Oka] diagram. Solid lines in Fig. 1 show the Dy-Sn phase diagram thermodynamically assessed by [2004Wan]. The phase diagram data used are essentially the same as [1993Oka]. The strongly asymmetric Dy5Sn3 liquidus in [1995Oka] is more symmetric in [2004Wan]. Therefore, the diagram of [2004Wan] is more likely in this range. However, the diagram of [2004Wan] needs confirmation in the range between DySn2 and 100 at.% Sn because the result of [1993Pal] was not taken into account in the assessment. According to [1993Pal], Dy3Sn7 (dimorphic) exists and DySn3 is stable below 470 °C, not above 470 °C, as shown

in Fig. 1. Further experimental information is needed in this range. References 1983Che: R.Z. Chen and J.X. Zheng, Acta Phys. Sin., Vol 32 (No. 7), 1983 p 933-938 1992Ere: V.N. Eremenko, M.V. Bulanova, and P.S. Martsenjuk, The Dysprosium-Tin Phase Diagram, J. Alloy. Compd., Vol 189, 1992, p 229-233 1993Oka: H. Okamoto, Dy-Sn (Dysprosium-Tin), J. Phase Equilibria, Vol 14 (No 3), 1993, p 397-398 1995Oka: H. Okamoto, Comment on Dy-Sn (Dysprosium-Tin), J. Phase Equilibria, Vol 16 (No. 1), 1995, p 99-100 2004Wan: X. Wang, X. Su, and F. Yin, A Thermodynamic Assessment of the Dy-Sn System, in The 12th National Symposium on Phase Diagram, Materials, Design, and Their Applications (China), 2004, p 88-92 (in Chinese)

Fig. 1 Dy-Sn phase diagram

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Journal of Phase Equilibria and Diffusion Vol. 26 No. 2 2005