Фазовая диаграмма системы Ce-Cr

К оглавлению: Другие диаграммы (Others phase diargams)

Ce-Cr (Cerium-Chromium) A. Palenzona and S. Cirafici The assessed Ce-Cr phase diagram is based on the work of [69Sve], [70Kob], and [71Kob2] and on the careful revision of [74Gsc]. Melting point and transformation temperatures for the pure elements are corrected to the accepted values. Because no additional, more recent experimental work has been reported, large parts of the phase diagram remain unverified; reliable mutual solubility data are also needed. Early studies [57Ter, 59Sav] indicated that a wide monotectic equilibrium extends from about 23 to 96 at.% Cr at 1780 C. The solubility of Ce in (Cr) at 1700 C was found to be about 2.3 at.%; at 20 C, it dropped to 0.56 to 0. 75 at.%. No intermediate phases were found. [69Sve] investigated the whole composition range, confirming substantially the results of [57Ter] and [59Sav]. According to [69Sve], the solubility of Ce in ( Cr) at 1790 C is about 1.0 at.%. [70Kob], [71Kob1], and [71Kob2] investigated carefully the solubility of Ce in (Cr). Their results ranged from 0.2 at.% Ce at 1000 C to 1.1 at.% Ce at 1750 C. [74But] studied the effect of RE metals on the antiferromagnetism of Cr and found that metals of the Ce subgroup refine Cr and do not noticeably affect its N‚el point. 57Ter: V.F. Terekhova and E.M. Savitskii, Redkie Metally i Splavy, Trudy Pervogo Vsesoyuz. Soveshchaniya po Splavam Redkikh Metal., Akad. Nauk SSSR, Inst. Met. im. A.A. Baikova, Moscow, 189-201 (1957) in Russian. 59Sav: E.M. Savitskii, V.F. Terekhova, and A.V. Kholopov, Zh. Neorg. Khim., 4, 435-438 (1959) in Russian. 69Sve: V.N. Svechnikov, G.F. Kobzenko, V.G. Ivanchenko, and V.G. Martinchuk, Dop. Akad. Nauk Ukr. RSR, A, 31, 354-356 (1969) in Russian. 70Kob: G.F. Kobzenko, A.G. Kholodov, V.G. Ivanchenko, E.L. Martinchuk, and O.N. Kashevskaya, Dop. Akad. Nauk Ukr. RSR, A, 32, 1045-1048 (1970) in Ukrainian. 71Kob1: G.F. Kobzenko, A.G. Kholodov, V.G. Ivanchenko, E.L. Martinchuk, and O. N. Kashevskaya, Diagrammy Sostoyaniya Metal Sist., Mater. Vses. Soveshch., 4th ed., N.V. Ageev, Ed., Nauka, Moscow, 177-180 (1971) in Russian. 71Kob2: G.F. Kobzenko, A.G. Kholodov, V.G. Ivanchenko, E.L. Martinchuk, and O. N. Kashevskaya, Metallofizika, 33, 95-99 (1971) in Russian. 74But: A.K. Butylenko, A.N. Rakitskii, and N.I. Shofman, Metallofizika, 50, 77- 83 (1974) in Russian. 74Gsc: K.A. Gschneidner, Jr. and M.E. Verkade, Selected Cerium Phase Diagrams, Report IS-RIC-7, Rare-Earth Information Center, Energy and Mineral Resources Research Institute, Iowa State University, Ames, IA, 18-19 (1974). Published in Bull. Alloy Phase Diagrams, 11(5), Oct 1990. Complete evaluation contains 1 figure, 3 tables, and 15 references. Special Points of the Ce-Cr System