Фазовая диаграмма системы Bi-Zr

К оглавлению: Другие диаграммы (Others phase diargams)


Bi-Zr (Bismuth-Zirconium) H. Okamoto The assessed Bi-Zr phase diagram is based primarily on the work of [64Ham], who included Bi2Zr, BiZr, Bi2Zr3, and BiZr2 as equilibrium phases. BiZr3 was discovered later by [66Mat]. The relationship of BiZr3 to other phases is unknown. The solubility of Zr in liquid Bi was expressed as log (ppm Zr) = 6.66 - 2760/ T [55Wee] or 6.69 - 2780/T [61Sch], where ppm is by weight and T is in K. The measured temperature range was approximately 300 to 700 C. The solubility of Zr as reported by [55Wee] and [61Sch] is very much less than that given by [ 64Ham] (the assessed diagram). The reason for this disagreement is unknown. [66Mat] reported the superconducting transition temperature of BiZr3 as 2.35 to 2.84 K. In the diagram of [63Bad], an 80 at.% Zr phase (BiZr4?) was shown in equilibrium with (aZr). No additional information is available. The maximum solubility of Bi in (bZr) is about 15 at.% [64Ham, 64Wil]. The solubility of Bi in (aZr) at the peritectoid temperature is about 4 at.% [ 63Bad, 64Ham, 64Wil]. 55Wee: J.R. Weeks, C.J. Klamut, M. Silberberg, W.E. Miller, and D.H. Gurinsky, Proc. U.N. Int. Conf. Peaceful Uses At. Energy, Geneva, Vol. 9, 341-355 (1955). 61Sch: D.G. Schweitzer and J.R. Weeks, Trans. ASM, 54, 185-200 (1961). 63Bad: T.A. Badaeva and L.I. Rybakova, O.S. Ivanov, Ed., Structures and Properties of Uranium, Thorium, and Zirconium Alloys, 303-308 (1963) in Russian; TR: U.S. At. Energy Comm., AEC-tr-6367 (1964). 64Ham: C.B. Hamilton and H.A. Wilhelm, U.S. At. Energy Comm., IS-1269 (1964). 64Wil: H.A. Wilhelm and C.B. Hamilton, U.S. At. Energy Comm., IS-900, M35-M36 ( 1964). 66Mat: B.T. Matthias, A. Jayaraman, T.H. Geballe, K. Andres, and E. Corenzwit, Phys. Rev. Lett., 17, 640-643 (1966). 68Ebe: D. Eberle and K. Schubert, Z. Metallkd., 59, 306-308 (1968). Published in Bull. Alloy Phase Diagrams, 11(3), Jun 1990. Complete evaluation contains 1 figure, 2 tables, and 10 references. 1