Фазовая диаграмма системы Li-Ni

К оглавлению: Другие диаграммы (Others phase diargams)


Li-Ni (Lithium-Nickel) K.J. Lee, S.Y. Lee, and P. Nash A very limited amount of experimental data is available for the Li-Ni system. However, interest in Li as a coolant in nuclear energy generation has resulted in studies of its ability to dissolve certain other metals, including Ni. These studies generated a limited amount of information regarding the liquidus between the monotectic temperature and the Li-rich peritectic. The assessed Li-Ni phase diagram comprises a monotectic reaction at 1300 C and 85 at.% Ni and a Li-rich peritectic reaction at 181 C and ~0 at.% Ni, both of which are based on a thermodynamic model developed by the present evaluators, with review of the data of [61Lea] and [66Tak]. The system was modeled by fitting the available solubility data and using the comment by [ 66Tak] that the monotectic temperature lies above 1200 C. There are no intermediate phases in the system. The solubility of Ni in (Li) increases from 0.01 at.% at 600 C to 0.57 at.% at 1200 C, and the solubility of Li in (Ni) decreases from 3.03 at.% at 1200 C to 1.96 at.% at 700 C. Further experimental work is required to define the high-temperature phase boundaries involving the liquid above 1200 C and to locate the monotectic point and the peritectic temperature. No thermodynamic data are available for the Li-Ni system, except for the pure metals; and this area requires further work. Editor's note: The Li boiling point was adjusted to the current accepted value. 61Lea: H.W. Leavenworth and R.E. Cleary, Acta Metall., 9, 519-520 (1961). 66Tak: Y. Takeuchi, K. Mochizuki, K. Watanabe, and I. Obinato, J. Jpn. Inst. Met., 29, 801-806 (1966) in Japanese; TR: Metallwiss. Tech., 20, 2-8 (1966) in German. 83Cha: M.W. Chase, Bull. Alloy Phase Diagrams, 4(1), 124 (1983). Published in Phase Diagrams of Binary Nickel Alloys, 1991. Complete evaluation contains 4 figures, 3 tables, and 12 references. 1