Фазовая диаграмма системы Dy-Ho

К оглавлению: Другие диаграммы (Others phase diargams)


Dy-Ho (Dysprosium-Holmium) K.A. Gschneidner, Jr. and F.W. Calderwood The assessed Dy-Ho phase diagram is based on the thermal and X-ray studies of [ 73Spe]. The liquidus/solidus is drawn as a single line, because the thermal arrests on both the heating and cooling curves were within 1.5 C. Likewise, the solvus for the bcc = cph transformation is drawn as a single line. The solvus and solidus lines merge, indicating a peritectic reaction. The allotropic transformation temperature of Dy is raised linearly by the addition of Ho. A continuous solubility range was observed in the liquid and in the cph form. [79Shi] applied the Kaufman approach to the calculation of the Dy-Ho phase diagram. The calculated peritectic point fell at a lower temperature and concentration of Ho than the experimentally indicated peritectic point. 73Spe: F.H. Spedding, B. Sandeen, and B.J. Beaudry, J. Less-Common Met., 31, 1 (1973). 79Shi: G.J. Shiflet, L.K. Lee, and H.I. Aaronson, Calphad, 3, 129 (1979). Published in Bull. Alloy Phase Diagrams, 4(3), Nov 1983. Complete evaluation contains 2 figures and 4 references. 1