材料期刊网

The isothermal section at 800 degrees C and vertical sections of SmFe2-DyFe2 and (Sm0.86Dy0.14) Fe-x (1.6 <= x <= 2.4) in the Sm-Dy-Fe system were determined by using optical microscopy, X-ray diffraction analysis, electron probe micro-analysis, and differential thermal analysis techniques. The isothermal section possesses 6 single-phase regions, 7 two-phase regions, and 3 three-phase regions. There are five intermetallic phases: (Sm, Dy) Fe-2, (Sm, Dy) Fe-3, (Sm, Dy)(6)Fe-23, Th2Zn17-type (Sm, Dy)(2)Fe-17, and Th2Ni17-type (Sm, Dy)(2)Fe-17. No Sm6Fe23 and (Sm, Dy)(2)Fe-7 phases exist in the ternary system. The vertical section of SmFe2-DyFe2 in the Sm-Dy-Fe system contains 2 single-phase regions, 2 two-phase regions, and 1 three-phase region. Investigation of the vertical section of (Sm0.86DY0.14) Fe-x (1.6 <= x <= 2.4) indicates that it consists of 2 single-phase regions, 5 two-phase regions, and 1 three-phase region.