Paper PII-22

A thermodynamic assessment of the Dy–Sn system

Wang Xinming¹ , Tedenac J.C.² , Su Xuping ¹ and Yin Fucheng¹

¹Institute of Materials Research, School of Mechanical Engineering, Xiangtan University, Hunan 411105

P. R. China

² Laboratoire de Physicochimie de la Matière Condensée, UMR CNRS 5617, Université de Montpellier II, Sciences et techniques du Languedoc,  Place E. Bataillon, 34095 Montpellier cdx 5 France

The Dy-Sn binary system has been optimized using the available experimental information on the phase diagram and thermodynamics based on the CALPHAD approch. During the optimizing procedure all the experimental data were optimized simultaneously. The system contains seven intermetallic compounds: Dy₅sn₃, Dy₅sn₄, Dy₁₁Sn_10, DySn, Dy₄Sn_5, DySn₂ and DySn₃. They were treated as stoichiometric compounds. The thermodynamic descriptions for all the stable phase in this system are obtained. The calculated phase diagram and thermodynamic quantities agree well with the experiment values.