The Dy—Cr—Si and Dy—Sc—Si Systems at 1200 K.

Abstract

Phase equilibria in the Dy–Cr–Si and Dy–Sc–Si systems were investigated by X-ray powder diffraction, local X-ray spectral analysis and the isothermal sections at 1200 K were obtained. The CeGa2Al2-type (space group I4/mmm, No.139) DyCr2Si2 compound has been confirmed in the Dy–Cr–Si system. Extended solid solution regions were found in the Dy–Sc–Si system for AlB2-type Dy1−xScxSi2, CrB-type Dy1−xScxSi, Sm5Ge4-type Dy5−xScxSi4 and Mn5Si3-type Dy5−xScxSi3 solid solutions.