Abstract
In production of melted ingots of highly refractory alloys in systems with zirconium, yttrium, and erbium oxides we have identified the phenomenon of an increasing specific volume in the course of primary crystallization under unilateral center-symmetric heating. The positive values of the volume crystallization effect are presumably due to the emergence of point defect complexes in the course of formation of a hexagonal structure in solutions of nonisovalent metals (zirconium and rare-earth elements) oxides.
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References
V. A. Dubok, A. A. Frolov, and E. R. Andrievskaya, “Electric resistivity of solid solutions in HfO2-Y2O3-CaO and ZrO2-Y2O3-CaO systems at high temperatures,” in: Contemporary Problems of Physics of Materials [in Russian], IPM AN USSR, Kiev (1990).
A. A. Frolov, Yu. A. Frolov, E. R Andrievskaya, et al., “The possibility of using crystallization specifics in the focal zone of an optical furnace to estimate the melt density,” in: Proc. Intern. Conf. MMS’2005, Sept. 26–30, 2005.
B. G. Livshits, V. S. Kraposhin, and Ya. L. Linetskii, Physical Properties of Melts and Alloys [in Russian], Metallurgiya, Moscow (1980).
S. S. Hecker, “Plutonium and Its Alloys. From atoms to microstructure,” Los Alamos Science, No. 26, 290–335 (2000).
S. E. Bradshow, “Phenomena observed in melting and crystallization of germanium,” in: Methods for Producing Pure Metals, Collected translations ed. by V. S. Emel’yanov and A. I. Evstyukhin, IL, Moscow (1957).
A. S. Basin, Ya. L. Kolotov, and I. A. Vashukov, “Density variation in gray cast iron under slow crystallization,” Izv. AN SSSR, No. 3, 71–75 (1978).
A. S. Bunin, I. A. Vashukov, Ya. L. Kolotov, et al., “Regularities of volume and density variations in gray cast iron under primary crystallization,” in: Preprint 52-80, AN SSSR, Siberian branch, Institute of Thermal Physics (1960).
M. F. Trubelia and V. S. Stubican, “Phase equilibria and ordering in the system Zirconia-Hafnia-Yttria,” J. Amer. Ceram. Soc., 71(8), 662–666 (1988).
E. R. Andrievskaya, L. M. Lopato, and A. V. Shevchenko, “Liquidus surface in the phase diagram of ZrO-Y2O3-Er2O3 system,” Izv. RAN. Neorganich. Materialy, 32(6), 721–726 (1996).
P. A. Arseniev, L. M. Kovba, H. S. Bagdasarov, et al., Compounds of Rare-Earth Elements. Systems with Oxides of Group I–III Elements [in Russian], Nauka, Moscow (1983).
S. G. Tresvyatskii, L. M. Lopato, V. B. Vishnevkeii, et al., New Materials Based on Oxides and Synthesized Fluorosilicates, Naukova Dumka, Kiev (1982).
J. Coutures, F. Sibieude, and M. Foex, “Etude a Haute Temperature des Systems Formes per les sesquioxides de Lanthane avec les Sesquioxides de Lanthanides II. Influence de la Trempe sur la Nature des Phases Obtenues a la Temperature Ambinate,” J. Solid State Chem., 17(4), 377–384 (1976).
L. H. Ahrens, “Use of ionization potentials and ionic radii of the elements,” Geohim et Cosmachim. Acta, No. 2, 155–158 (1952).
S. S. Gorelik and M. Ya. Dashevskii, Science of Dielectrics and Semiconductor Materials [in Russian], Metallurgiya, Moscow (1988).
I. I. Novikov, G. A. Korol’kov, and V. N. Arutyunyan, “Additivity-based calculation of specific volume of melts in binary systems at liquidus temperatures,” Izv. AN SSSR. Metally, No. 2, 69–71 (1973).
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Translated from Novye Ogneupory, No. 6, pp. 68–72, June, 2007.
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Frolov, A.A., Anrievskaya, E.R., Kornienko, O.A. et al. Specifics of crystallization of highly refractory alloys based on zirconium, yttrium, and erbium oxides. Refract Ind Ceram 48, 185–188 (2007). https://doi.org/10.1007/s11148-007-0057-x
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DOI: https://doi.org/10.1007/s11148-007-0057-x