Advertisement

Refractories and Industrial Ceramics

, Volume 48, Issue 3, pp 185–188 | Cite as

Specifics of crystallization of highly refractory alloys based on zirconium, yttrium, and erbium oxides

  • A. A. Frolov
  • E. R. Anrievskaya
  • O. A. Kornienko
  • Yu. A. Frolov
Scientific Research and Developments

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.

Keywords

Specific Volume Gray Cast Iron Focal Zone Ingot Surface Refractory Alloy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    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).Google Scholar
  2. 2.
    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.Google Scholar
  3. 3.
    B. G. Livshits, V. S. Kraposhin, and Ya. L. Linetskii, Physical Properties of Melts and Alloys [in Russian], Metallurgiya, Moscow (1980).Google Scholar
  4. 4.
    S. S. Hecker, “Plutonium and Its Alloys. From atoms to microstructure,” Los Alamos Science, No. 26, 290–335 (2000).Google Scholar
  5. 5.
    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).Google Scholar
  6. 6.
    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).Google Scholar
  7. 7.
    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).Google Scholar
  8. 8.
    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).CrossRefGoogle Scholar
  9. 9.
    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).Google Scholar
  10. 10.
    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).Google Scholar
  11. 11.
    S. G. Tresvyatskii, L. M. Lopato, V. B. Vishnevkeii, et al., New Materials Based on Oxides and Synthesized Fluorosilicates, Naukova Dumka, Kiev (1982).Google Scholar
  12. 12.
    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).CrossRefGoogle Scholar
  13. 13.
    L. H. Ahrens, “Use of ionization potentials and ionic radii of the elements,” Geohim et Cosmachim. Acta, No. 2, 155–158 (1952).Google Scholar
  14. 14.
    S. S. Gorelik and M. Ya. Dashevskii, Science of Dielectrics and Semiconductor Materials [in Russian], Metallurgiya, Moscow (1988).Google Scholar
  15. 15.
    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).Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2007

Authors and Affiliations

  • A. A. Frolov
    • 1
    • 2
  • E. R. Anrievskaya
    • 1
    • 2
  • O. A. Kornienko
    • 1
    • 2
  • Yu. A. Frolov
    • 1
    • 2
  1. 1.I. N. Frantsevich Institute of Science of Materials of the National Academy of Sciences of UkraineUkraine
  2. 2.Institute of Magnetism of the National Academy of Sciences of UkraineUkraine

Personalised recommendations