Фазовая диаграмма системы Gd-Ho

К оглавлению: Другие диаграммы (Others phase diargams)


Gd-Ho (Gadolinium-Holmium) K.A. Gschneidner, Jr. and F.W. Calderwood The assessed phase diagram for the Gd-Ho system has been drawn to reflect the behavior of high-purity metals, because [73Spe] showed conclusively that high- purity Ho does not have a bcc form, despite earlier published results on less- pure metals that suggested a high-temperature transformation. The phase boundary for the bcc = cph transformation is shown as a dashed line beginning at 1235 C, which is the temperature for this transition in pure Gd. This boundary intersects the liquidus/solidus line somewhere near 95 at.% Ho. This construction suggests a possible peritectic reaction in this region and conforms to the diagram of [73Spe]. 73Spe: F.H. Spedding, B. Sandeen, and B.J. Beaudry, J. Less-Common Met., 31, 1 (1973). Published in Bull. Alloy Phase Diagrams, 4(3), Nov 1983. Complete evaluation contains 2 figures and 3 references. 1