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Oxidation of Metals

, Volume 62, Issue 3–4, pp 273–291 | Cite as

Internal Oxidation of a Ag-l.3 at.% Se Alloy. Part I: Composition and Appearance of Oxidation Products

  • J. Roth
  • L. Kosec
  • P. Škraba
  • M. Bizjak
  • J. Medved
  • M. Dobnikar
  • I. Anžel
Article

Abstract

The internal oxidation of a two-phase Ag-1.3 at.% Se alloy in pure oxygen was studied at 750, 800 and 830°C. The alloy is composed of a dilute solid solution of selenium in silver) and Ag2Se intermetallic particles. The internal oxidation of this alloy proceeds through gradual in-situ oxidation of the Ag2Se particles as well as through diffusive internal oxidation of selenium from solid solution. Gradual in-situ internal oxidation of Ag2Se particles reflects itself in the appearance of two internal-oxidation fronts, inner and outer, marking the beginning and end of the in-situ oxidation of Ag2Se particles. The oxide phase formed during in-situ oxidation is the molten double oxide, Ag2SeO3. A theoretical treatment of the phase relationships in a hypothetical Ag–Ag2Se–Ag2SeO3 ternary phase diagram is presented to assist the explanation of the mechanism of in-situ oxidation. The kinetics of oxidation are presented in Part II.

silver–selenium alloy Ag2Se in-situ oxidation Ag2SeO3 internal oxidationof two-phase alloys. 

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REFERENCES

  1. 1.
    J. Kapteijn and J. L. Meijering, Zeitschrift Fur Metallkunde 64, 578 (1973).Google Scholar
  2. 2.
    J. L. Meijering, Advances in Material Research 5, 1 (1971).Google Scholar
  3. 3.
    F. N. Rhines and A. H. Grobe, Transaction AIME 147, 318 (1942).Google Scholar
  4. 4.
    H. Spengler, Metall. 14, 685 (1960).Google Scholar
  5. 5.
    F. Gesmundo and B. Gleeson, Oxidation of Metals 44, 211 (1995).Google Scholar
  6. 6.
    S. B. Dijkstra, J. J. A. van Stapele, and J. L. Meijering, Zeitschrift Fur Metallkunde 63, 49 (1973).Google Scholar
  7. 7.
    T. B. Massalski, ed., Binary Alloys Phase Diagrams, 2nd ed. (ASM, Materials Park, OH, 1990).Google Scholar
  8. 8.
    L. Kosec, J. Roth, M. Bizjak, and I. Anžel, Oxidation of Metals 56, 395 (2001).Google Scholar
  9. 9.
    JCPDS cards: # 4–783 for Ag, # 24–1041 for Ag2Se and # 82–2226 for Ag2SeO3.Google Scholar
  10. 10.
    N. M. Selivanova, Z. L. Leshinskay, and I. V. Klusina, Zhurnal Neorganicheskoi Khimii 13, 2351 (1968).Google Scholar
  11. 11.
    I. Barin, Thermochemical Data of Pure Substancies (Weinheim, 1993).Google Scholar
  12. 12.
    S. L¨oschau, Freiberger Forschungsh. B60, 7 (1961).Google Scholar
  13. 13.
    W. A. Dutton, A. J. van der Steen, and N. J. Themelis, Metal Transition 2, 3091 (1971).Google Scholar
  14. 14.
    T. Ishihara, Kyushu Kozan Gakkai-Shi 28, 519 (1961); CA 55, 13783 (1961).Google Scholar
  15. 15.
    F. N. Rhines, Phase Diagrams in Metallurgy (pmMcGraw-Hill, New York-Toronto-London), 1956), p. 55 and 199.Google Scholar
  16. 16.
    P. Okkonen, L. Hiltunen, M. Koskelinna, and L. Niinisto, Acta Chemica Scandinavica 48, 857 (1994).Google Scholar
  17. 17.
    Y. B. Dimitriev, S. I. Yordanov, and L. I. Lakov, Journal of Non-Crystalline Solids 192 & 193, 179 (1995).Google Scholar
  18. 18.
    V. P. Verma, Thermochimica Acta 327, 63 (1999).Google Scholar
  19. 19.
    F. Gesmundo, F. Viani, and Y. Niu, Oxidation of Metal 45, 51 (1996).Google Scholar
  20. 20.
    E. Raub and E. R¨ oschel, Metall. 25, 7 (1971).Google Scholar
  21. 21.
    T. Surholt, C. Minkwitz, and C. Herzig, Acta Materialia 46, 1849 (1998).Google Scholar
  22. 22.
    K. W. Bagnall, The Chemistry of Selenium, Tellurium, and Polonium (Elsevier, Amsterdam-London-New York, 1966), p. 53.Google Scholar
  23. 23.
    F. Gesmundo, F. Viani, and Y. Niu. Oxidation of Metals 47, 355 (1997).Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2004

Authors and Affiliations

  • J. Roth
    • 1
  • L. Kosec
    • 1
  • P. Škraba
    • 1
  • M. Bizjak
    • 1
  • J. Medved
    • 1
  • M. Dobnikar
    • 2
  • I. Anžel
    • 3
  1. 1.Department of Materials and Metallurgy, Faculty of Natural Sciences and EngineeringUniversity of LjubljanaSlovenia
  2. 2.Department of Geology, Faculty of Natural Sciences and EngineeringUniversity of LjubljanaSlovenia
  3. 3.Faculty of Mechanical EngineeringUniversity of MariborSlovenia

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