The Sm-In system was studied using differential thermal, metallographic and X-ray analyses. The following intermediate phases were observed: Sm2In (melting point, 1090 ± 10 °C), Sm1+xIn (melting point, 1210 ± 20 °C), Sm3In5 (melting point, 1110 ± 10 °C) and SmIn3 (melting point, 1130 ± 10 °C). Five eutectics occur: β-Sm2In (905 ± 5 °C, 16.5 ± 1 at.% In), Sm2In-Sm1+xIn (1080 ± 10 °C, 35 ± 0.5 at.% In), Sm1+xIn-Sm3In5 (1090 ± 10 °C, 59.5 ±1 at.% In), Sm3In5-SmIn3 (1075 ± 10 °C, 67 ± 1 at.% In) and SmIn3-In (154 °C, more than 99.5 at.% In). β-Sm2In decomposes eutectoidally at 800 ±10 °C and 12 ± 1 at.% In. The crystal structures of Sm2In (hP6, Ni2In type), Sm3In5 (oC32, Pu3Pd5-like type) and SmIn3 (cP4, AuCu3 type) were confirmed. A structure of the cP2 CsCl type or the c12 tungsten type is suggested for the Sm1+xIn compound. The general characteristics of the phase diagram are briefly discussed and compared with those of the La-In, Ce-In and Pr-In systems. © 1982.

Phase equilibria in the Sm-In system

SACCONE, ADRIANA;DELFINO, STEFANO;FERRO, RICCARDO
1982-01-01

Abstract

The Sm-In system was studied using differential thermal, metallographic and X-ray analyses. The following intermediate phases were observed: Sm2In (melting point, 1090 ± 10 °C), Sm1+xIn (melting point, 1210 ± 20 °C), Sm3In5 (melting point, 1110 ± 10 °C) and SmIn3 (melting point, 1130 ± 10 °C). Five eutectics occur: β-Sm2In (905 ± 5 °C, 16.5 ± 1 at.% In), Sm2In-Sm1+xIn (1080 ± 10 °C, 35 ± 0.5 at.% In), Sm1+xIn-Sm3In5 (1090 ± 10 °C, 59.5 ±1 at.% In), Sm3In5-SmIn3 (1075 ± 10 °C, 67 ± 1 at.% In) and SmIn3-In (154 °C, more than 99.5 at.% In). β-Sm2In decomposes eutectoidally at 800 ±10 °C and 12 ± 1 at.% In. The crystal structures of Sm2In (hP6, Ni2In type), Sm3In5 (oC32, Pu3Pd5-like type) and SmIn3 (cP4, AuCu3 type) were confirmed. A structure of the cP2 CsCl type or the c12 tungsten type is suggested for the Sm1+xIn compound. The general characteristics of the phase diagram are briefly discussed and compared with those of the La-In, Ce-In and Pr-In systems. © 1982.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/843323
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