Фазовая диаграмма системы Ta-W

К оглавлению: Другие диаграммы (Others phase diargams)


Ta-W (Tantalum-Tungsten) R. Krishnan, S.P. Garg, and N. Krishnamurthy The complete miscibility of Ta and W over the entire composition range first stated by [05Bol] was proved by lattice parameter and microhardness measurements of alloys containing 30, 50, and 70 at.% W by [46Buc]. The assessed Ta-W phase diagram is based on the work of [69Rud]. The activities of Ta and W exhibit negative deviations from ideality. The observed small negative entropies of mixing have been attributed to vibrational contributions and/or short-range ordering in these alloys [ 73Sin]. 05Bol: W.V. Bolton, Z. Elektrochem., 11, 45 (1905). 46Buc: H. Buckle, Metallforsch., 1, 53-56 (1946). 69Rud: E. Rudy, Rep. No. AFML-TR-65-2, Part V, Air Force Materials Laboratory, Wright Patterson AFB, OH (1969). 73Sin: S.C. Singhal and W.L. Worrell, Metall. Trans., 4, 895-898 (1973). Published in J. Alloy Phase Diagrams, 3(1), Jan 1985. Complete evaluation contains 2 figures, 1 table, and 10 references. 1