Фазовая диаграмма системы Ni-Se

К оглавлению: Другие диаграммы (Others phase diargams)


Ni-Se (Nickel-Selenium) S.Y. Lee and P. Nash The assessed Ni-Se phase diagram is based on [72Kom], with review of the data of [60Hil], [63Kuz], and [66Gro]. Based on thermal arrest data, [63Kuz] reported polymorphic transformations of a› = b and a = a› at 620 and 590 C, respectively, for Ni3Se2. However, a metastable (not a polymorphic) form of bNi3сxSe2 (or a), existing between 560 and 510 C, depending upon cooling rate, was observed only on cooling [68Ste]. The suggested a›Ni3Se2 phase between aNi3Se2 and bNi3сxSe2 [63Kuz] is probably the same phase as this metastable phase a›Ni3Se2 [68Ste]. [63Kuz] reported that the solubility of Se in (Ni) was less than 0.1 at.% Se at 620 C based on lattice parameter measurements. No other experimental data on solubility are available. [60Gro] studied the phase transition of Ni1-xSe with three different compositions at low temperatures between -268 and 77 C and at high temperatures between 25 and 777 C [70Gro]. At low temperatures, this phase did not show any type of transition, independent of the phase compositions [ 60Gro]. However, at high temperatures, Se-rich Ni1-xSe showed one or two l-type transition(s) [70Gro]. Ni1-xSe phase with 53.3 at.% Se showed one transition with a heat capacity maximum at 230 C, and Ni1-xSe with 55.6 at.% Se showed two transitions with maxima at 316 and 722 C. [70Gro] attributed the transition(s) to vacancy disordering. Magnetic susceptibility measurements of the Ni2Se phase between -269 and 627 C [69Fur] showed weak, temperature-independent paramagnetism, confirming the results of [56Gro] and [68Bit]. The Ni1-xSe phase also showed weak paramagnetism and was reported to be slightly dependent on temperature in the range between -183 C to 450 C [56Gro]. Using the Gouy method, [56Gro] also reported that both phases were field-strength independent. 56Gro: F. Gronvold and E. Jacobsen, Acta Chem. Scand., 10(9), 1440-1454 (1956). 60Gro: F. Gronvold, T. Thurmann-Moe, E. Westrum, Jr., and N. Levitin, Acta Chem. Scand., 14(3), 534-640 (1960). 60Hil: J.-H. Hiller and W. Wegener, N. Jb. Miner. Abh., 94, 1147-1159 (1960) in German. 63Kuz: K. Kuznecov, A. Eliseev, Z. Spak, K. Palkina, M. Sokolova, and A. Dmitriev, Proc. 4th All-Union Conf. on Semiconductor Materials, Moscow, U.S.S. R., 159-173 (1961), in Russian; TR: Consultants Bureau, New York, 128-139 ( 1963). 66Gro: F. Gronvold, R. Mollerud, and E. Rost, Acta Chem. Scand., 20(7), 1997- 1998 (1966). 66Rou: J.-P. Rouche and P. Lecocq, C.R. Hebd. S‚ances Acad. Sci., Ser. C, Sci. Chem. 262(14), 555-556 (1966) in French. 68Bit: T. Bither, R. Bouchard, W. Cloud, P. Donohue, and W. Siemons, Inorg. Chem., 7(11), 2208-2220 (1968). 68Ste: A. Stevels, J. Bouwma, G. Wiegers, and F. Jellinek, Rec. Trav. Chim. Pays-Bas, 87, 705-708 (1968). 69Fur: S. Furuseth, A. Kjekshus, and A. Andresen, Acta Chem. Scand., 23(7), 2325-2334 (1969). 70Gro: F. Gronvold, Acta Chem. Scand., 24(3), 1036-1057 (1970). 72Kom: K. Komarek and K. Wessely, Monatsh. Chem., 103, 923-933 (1972) in German. 75Ake: G. Akesson and E. Rost, Acta Chem. Scand., A, 29(2), 236-240 (1975). Published in Phase Diagrams of Binary Nickel Alloys, 1991. Complete evaluation contains 3 figures, 4 tables, and 27 references. Special Points of the Ni-Se System