Фазовая диаграмма системы Ir-Nb

К оглавлению: Другие диаграммы (Others phase diargams)


Ir-Nb (Iridium-Niobium) H. Okamoto Little information has been added on the Ir-Nb system since [Shunk] reviewed it. The assessed Ir-Nb phase diagram is based primarily on the data of [64Gie2] . The equilibrium phases are (1) the liquid, L; (2) the fcc terminal phase, ( Ir); (3) cubic AuCu3-type Ir3Nb; (4) orthorhombic a2; (5) tetragonal AuCu- type a1; (6) the s phase; (7) cubic Cr3Si-type IrNb3; and (8) the bcc terminal phase, (Nb). The maximum solubility of Nb in (Ir) is 16.0 at.% at 2400 C [64Gie2]. The maximum solubility of Ir in (Nb) is 12.0 at.% at 2110 C [64Gie2]. 55Gel: S. Geller, B.T. Matthias, and R. Goldstein, J. Am. Chem. Soc., 77(6), 1502-1504 (1955). 58Kna: A.G. Knapton, J. Inst. Met., 87, 28-32 (1958-1959). 59Dwi: A.E. Dwight and P.A. Beck, Trans. AIME, 215(12), 976-979 (1959). 61Mat: B.T. Matthias, V.B. Compton, and E. Corenzwit, Phys. Chem. Solids, 19(1- 2), 130-133 (1961). 63Zeg: S.T. Zegler and J.W. Downey, Trans. AIME, 227(12), 1407-1411 (1963). 64Gie1: B.C. Giessen and N.J. Grant, Acta Crystallogr., 17, 615-616 (1964). 64Gie2: B.C. Giessen, R. Koch, and N.J. Grant, Trans. AIME, 230(10), 1268-1273 (1964). 64Spo: F.J. Spooner and C.G. Wilson, Acta Crystallogr., 17, 1533-1538 (1964). 68Reu: E.C. van Reuth and R.M. Waterstrat, Acta Crystallogr. B, 24(2), 186-196 (1968). 74Mac: E.S. Machlin, Acta Metall., 22, 95-108 (1974). 86Wan: R.Y. Wan, Phys. Status Solidi (a), 94(2), 445-452 (1986). Submitted to the APD Program. Complete evaluation contains 1 figure, 3 tables, and 12 references. Special Points of the Ir-Nb System