Фазовая диаграмма системы Mo-Ta

К оглавлению: Другие диаграммы (Others phase diargams)


Mo-Ta (Molybdenum-Tantalum) R. Krishnan, S.P. Garg, and N. Krishnamurthy Mo-Ta is an isomorphous system in which Ta and Mo form a continuous series of bcc solid solutions [46Buc, 51Gea]. The assessed Mo-Ta phase diagram is based on the work of [69Rud] and [Molybdenum]. It has been calculated using the evaluated data of [Hultgren,E] and the method of [70Kau]. By X-ray diffraction, [70Pre] observed short-range order peaks for several single-crystal Mo-Ta alloys. [72Sin] determined thermodynamic properties of solid Mo-Ta alloys between 1000 and 1300 K using a galvanic cell with a thoria-based electrolyte. The activities of Ta and Mo exhibit large negative deviation from ideality. 46Buc: H. Buckle, Metallforsch., 53-56 (1946). 51Gea: G.A. Geach and D. Summers Smith, J. Inst. Met., 80, 143-147 (1951). 69Rud: E. Rudy, Rep. No. AFML-TR-65-2, Part V, Air Force Materials Laboratory, Wright Patterson AFB, OH (1969). 70Kau: L. Kaufman and H. Bernstein, Computer Calculation of Phase Diagrams with Special Reference to Refractory Metals, Academic Press, New York (1970). 70Pre: R. Predmore and R.J. Arsenault, Scr. Metall., 4, 213-218 (1970). 72Sin: S.C. Singhal and W.L. Worrell, in Metallurgical Chemistry, Proc. Symp., 1971, O. Kubaschewski, Ed., Her Majesty's Stationery Office, London, 65-74 ( 1972). Published in J. Alloy Phase Diagrams, 2(3), Sep 1986. Complete evaluation contains 3 figures, 2 tables, and 5 references. 1