Фазовая диаграмма системы Ge-Zr

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Ge-Zr (Germanium-Zirconium) J.P. Abriata, D. Arias, and J.C. Bolcich The equilibrium phases in the provisional Zr-Ge phase diagram are (1) the liquid, L; (2) the bcc terminal solid solution, (bZr), where Ge has a maximum solubility of approximately 0.9 at.% at 1537 C, the temperature of the eutectic reaction L = (bZr) + Zr3Ge; (3) the cph terminal solid solution, (aZr) , with a maximum solubility of approximately 1.0 at.% Ge at 896 C, the temperature of the peritectoid reaction (bZr) + Zr3Ge = (aZr); (4) the stoichiometric compound Zr3Ge, which has a tetragonal Ti3P-type crystal structure [65Ros] and is stable up to the peritectic L + Zr5Ge3 = Zr3Ge decomposition temperature of 1587 C; (5) the stoichiometric compound Zr5Ge3, which has a hexagonal Mn5Si3-type crystal structure, stable up to its congruent melting temperature of about 2330 C; (6) the stoichiometric compound Zr5Ge4, with the tetragonal Zr5Si4-type structure [65Ros]; (7) the stoichiometric compound ZrGe, which has an orthorhombic FeB-type crystal structure [65Ros], stable up to the peritectic Zr5Ge3 + L = ZrGe decomposition temperature of about 2240 C; (8) the stoichiometric compound ZrGe2, with the orthorhombic ZrSi2-type crystal structure, stable up to the peritectic ZrGe + L = ZrGe2 decomposition temperature of 1522 C; and (9) the cubic, diamond- type terminal solid solution, (Ge), with negligible solubility of Zr. The assessed phased diagram is based primarily on the work of [56Car]. A similar Ge-Zr phase diagram has been reported in [Zirconium]. Using a melt-spinning technique, [82Ino] produced amorphous Zr-Ge alloys that possess superconductivity and high strength combined with a highly ductile nature. The amorphous phase occured in the range of 13 to 21 at.% Ge. 56Car: O.N. Carlson, P.E. Armstrong, and H.W. Wilhelm, Trans. ASM, 48, 843-854 (1956). 65Ros: W. Rossteutscher and K. Schubert, Z. Metallkd., 56, 813-822 (1965) in German. 82Ino: A. Inoue, Y. Takahashi, N. Toyota, T. Fukase, and T. Masumoto, J. Mater. Sci., 17, 3299-3307 (1982). Published in Bull. Alloy Phase Diagrams, 7(1) Feb 1986. Complete evaluation contains 1 figure, 1 table, and 26 references. Special Points of the Zr-Ge System