Фазовая диаграмма системы Dy-Gd

К оглавлению: Другие диаграммы (Others phase diargams)

Dy-Gd (Dysprosium-Gadolinium) K.A. Gschneidner, Jr. and F.W. Calderwood The assessed Dy-Gd diagram reflects the anticipated phase relationships for alloys prepared from high-purity (99.9 + at.% pure) materials. [71Mar] reproduced the phase diagram for the Dy-Gd system, based on six data points that formed a smooth curve defining the solidus of the system. This solidus had a slight downward curvature, and the liquidus was drawn as a dashed straight line that connected the melting points of the end members. Dashed solvus lines having a small gap between them indicated the probable temperature/composition relationship for the bcc = cph transformation, but no data are presented in support of these lines. Less pure alloys can be expected to perform more in accord with the diagram of [71Mar]. In the assessed diagram, straight single lines are used to represent the liquidus/solidus gap and the bcc/cph solvus gap, because the two-phase fields are so narrow. 71Mar: I.A. Markova, R.S. Torchinova, V.F. Terekhova, and E.M. Savitskii, in Diagrammy Sostoyaniya Metallicheskikh Sistem (Constitutional Diagrams of Metallic Systems), N.V. Ageev, and O.S. Ivanov, Ed., Izdatel'stvo Nauka, Moscow, 1970 (1971). Published in Bull. Alloy Phase Diagrams, 4(3), Nov 1983. Complete evaluation contains 2 figures and 4 references. 1