Journal of Materials Science

, Volume 17, Issue 5, pp 1465–1473 | Cite as

Mechanical strengthening and impurity precipitation behaviour for divalent cation-doped alkali halides

  • C. Zaldo
  • J. García Solé
  • F. Agulló-López
Papers

Abstract

The yield stress of NaCl doped with Ca, Sr, Mn, Pb and Cd, KCl doped with Pb, and KBr doped with Sr and Pb, has been investigated as a function of the state of aggregation of the impurity. For all systems the yield-stress remains constant during isothermal annealing treatments if the impurity concentration is below a threshold value dependent on the material. At higher concentrations two opposite behaviours have been found. For systems where a coherent Suzuki phase has been detected (NaCl-Cd and NaCl-Mn) or is expected to occur (KCl-Pb, KBr-Pb and KBr-Sr) a marked softening is observed during annealing. On the other hand, a marked hardening appears for NaCl-Pb, NaCl-Ca and NaCl-Sr, where the stable dihalide phase has been shown to form. Mechanisms responsible for the reported behaviour are proposed and briefly discussed.

Keywords

Polymer Precipitation Halide Annealing Treatment Impurity Concentration 

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References

  1. 1.
    J. García Sole, C. Zaldo andF. Agulló-López,Phil. Mag. A 41 (1980) 177.Google Scholar
  2. 2.
    R. Capelletti, A. Gainotti andL. Pareti, Proceedings of the Symposium on Thermal and Photostimulated Currents in Insulation, October 1975, Dallas, edited by D. M. Smith (The Electrochemical Society, London, 1976).Google Scholar
  3. 3.
    A. Bohum, J. Dolejsi, M. Simeckova andH. Svobodova,Z. Phys. 243 (1971) 244.Google Scholar
  4. 4.
    J. L. Pascual, J. M. Cabrera andF. Agulló-López,Sol. Stat. Comm. 19 (1976) 917.Google Scholar
  5. 5.
    L. Marculescu,Phys. Stat. Sol. (b) 80 (1977) 265.Google Scholar
  6. 6.
    J. S. Dryden, S. Morimoto andJ. S. Cook,Phil. Mag. 12 (1965) 379.Google Scholar
  7. 7.
    W. G. Johnston,J. Appl. Phys. 33 (1962) 2050.Google Scholar
  8. 8.
    A. I. Sors andE. Lilley,Phys. Stat. Sol. (a) 32 (1975) 533.Google Scholar
  9. 9.
    C. W. A. Neway, R. P. Harrison andP. L. Pratt,Proc. Brit. Ceram. Soc. 6 (1966) 305.Google Scholar
  10. 10.
    K. Suzuki,J. Phys. Soc. Japan 10 (1955) 794.Google Scholar
  11. 11.
    Idem, ibid. 16 (1961) 67.Google Scholar
  12. 12.
    G. A. Andreev andV. A. Klimov,Sov. Phys. Sol. Stat. 16 (1975) 1926.Google Scholar
  13. 13.
    A. L. Guerrero, E. P. Butler andP. L. Pratt,J. de Physique Colloque C6 supplement au no. 7 41 (1980) C6–363.Google Scholar
  14. 14.
    W. Spengler andR. Kaiser,Phys. Stat. Sol. (b) 66 (1974) 107.Google Scholar
  15. 15.
    R. W. Davidge andP. L. Pratt,Phys. Stat. Sol. 6 (1964) 759.Google Scholar
  16. 16.
    B. H. Kear, C. E. Silverstone andP. L. Pratt,Proc. Brit. Ceram. Soc. 6 (1966) 269.Google Scholar
  17. 17.
    E. Pedrero, T. Ocaña, A. Gomez andM. Jose Yacaman,Thin Solid Films 27 (1975) 149.Google Scholar
  18. 18.
    W. C. Collins andJ. H. Crawford,J. Phys. Rev. 4B (1971) 3745.Google Scholar
  19. 19.
    P. G. Bertoldi, R. Capelletti, F. Fermi, M. Manfredi andV. J. Graveris,J. de Physique. Colloque C6 no. 7 (1980) 367.Google Scholar
  20. 20.
    P. L. Pratt, R. Chang andC. Newey,Appl. Phys. Letts. 3 (1963) 83.Google Scholar
  21. 21.
    R. L. Fleischer,Acta Metall. 9 (1961) 996.Google Scholar
  22. 22.
    P. Haasen, “Physical Metallurgy” (Cambridge University Press, Cambridge, 1978) Chap. 14.Google Scholar
  23. 23.
    A. Sors andE. Lilley,Phys. Stat. Sol. (a) 27 (1975) 469.Google Scholar
  24. 24.
    K. Suzuki,J. Phys. Soc. Japan 13 (1958) 79.Google Scholar
  25. 25.
    F. J. Lopez, H. Murrieta S., J. Hernandez A. Rubio O. andJ. Rubio O.,Phys. Rev. 22B (1980) 6428.Google Scholar
  26. 26.
    J. A. Chapman andE. Lilley,J. Mater. Sci. 10 (1975) 1154.Google Scholar
  27. 27.
    D. L. Kirk, A. R. Kahn andP. L. Pratt,J. Phys. D. Appl. Phys. 8 (1975) 2013.Google Scholar
  28. 28.
    E. Laredo andE. Darytage,J. Chem. Phys. 53 (1970) 2214.Google Scholar

Copyright information

© Chapman and Hall Ltd 1982

Authors and Affiliations

  • C. Zaldo
    • 1
  • J. García Solé
    • 1
  • F. Agulló-López
    • 1
  1. 1.Departmento de Optica y Estructura de la Materia and Instituto de Física del Estado Sólido (C.S.I.C.-U.A.M.)Universidad Autónoma de MadridCantoblanco, Madrid-34Spain

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