Фазовая диаграмма системы Co-Te

К оглавлению: Другие диаграммы (Others phase diargams)


Co-Te (Cobalt-Tellurium) K. Ishida and T. Nishizawa The assessed phase diagram for the Co-Te system is based on [73Kle] and [86Tsc] , with review of the data of [56Har], [57Ari], [59Dud], [70Bro], [72Gef], [ 75Kje], and [78Cha]. The equilibrium phases are (1) the liquid, L, exhibiting a miscibility gap in the Co-rich region with a monotectic temperature of 1460 C; (2) the Co-rich fcc terminal solid solution, (aCo), with very small solid solubility of Te; (3) the Co-rich cph terminal solid solution, (eCo), with negligible solid solubility of Te, stable up to 422 C; (4) the hexagonal phase b(Co2Te3), with a homogeneity range from 54.5 to 65 at.% Te, stable up to the congruent melting temperature of 1015 C; (5) the orthorhombic phase, g( CoTe2), with a homogeneity range from 66.5 to 70 at.% Te, stable up to the peritectic temperature of 764 C; and (6) the Te-rich hexagonal solid solution, (aTe). No data on the solid solubility of Co in (aTe) are available. Magnetic susceptibility measurements showed that the b(Co2Te3) and g(CoTe2) phases are both paramagnetic [56Har, 65Sau]. The magnetic moments were determined in the composition range 56.5 to 66.7 at.% Te [56Har]. The g(CoTe2) phase is reported to be a semiconductor [65Sau]. 56Har: H. Haraldsen, F. Gronvold, and T. Hurlen, Z. Anorg. Allg. Chem., 283, 143-164 (1956) in German. 57Ari: S.M. Ariya, E.M. Kolina, and M.S. Apurina, Zh. Neorg. Khim., 2, 23-29 ( 1957) in Russian. 59Dud: L.D. Dudkin and K.A. Dyuldina, Zh. Neorg. Khim., 4, 2313-2319 (1959) in Russian; TR: Russ. J. Inorg. Chem., 4, 1056-1059 (1959). 65Sau: G. Saut, C.R. Acad. Sci. Paris, 261, 3339-3342 (1965) in French. 66Bit: T.A. Bither, C.T. Prewitt, J.L. Gillson, P.E. Bierstedt, R.B. Flippen, and H.S. Young, Solid State Commun., 4, 533-535 (1966). 70Bro: G. Brostingen and A. Kjekshus, Acta Chem. Scand., 24, 1925-1940 (1970). 72Gef: R.M. Geffken, K.L. Komarek, and E.M. Miller, J. Solid State Chem., 4, 153-162 (1972). 73Kle: K.O. Klepp and K.L. Komarek, Monatsh. Chem., 104, 105-117 (1973) in German. 75Kje: A. Kjekshus and T. Rakke, Acta Chem. Scand., A29, 443-452 (1975). 76Gro: F. Gronvold, J. Chem. Thermodyn., 8, 757-775 (1976). 78Cha: G. Chattopadhyay, M.D. Karkhanavala, and M.S. Chandrasekharaiah, Metall. Trans. A, 10, 1587-1591 (1978). 83Nis: T. Nishizawa and K. Ishida, Bull. Alloy Phase Diagrams, 4, 387-390 ( 1983). 86Che: J.A.R. Cheda, E.F. Westrum, Jr., and F. Gronvold, Monatsh. Chem., 117, 1223-1238 (1986). 86Tsc: H. Tschlimer, B. Garlipp, and R. Rentzsch, Z. Metallkd., 77, 811-814 ( 1986). Submitted to the APD Program. Complete evaluation contains 1 figure, 5 tables, and 22 references. 1