Advertisement

Journal of Materials Science

, Volume 26, Issue 17, pp 4561–4566 | Cite as

Phase transformation and microstructure in (Mg,Ti)-PSZ

  • W. S. Lee
  • A. C. Su
  • P. Shen
Papers

Abstract

Phase transformation and microstructure in Mg-PSZ (8 mol% MgO), sintered (1600°C, 6 h) with 0 to 15 mol% additions of TiO2 (designated as 0T to 15T specimens), were studied by X-ray diffraction and electron microscopy. According to the room-temperature X-ray lattice parameter, the saturation of TiO2 in the cubic (c-) zirconia was reached at a total TiO2 addition of ca. 6 mol% at 1600°C, whereas the solubility limit in tetragonal (t-) zirconia was not reached in the composition range studied. The amount of t-zirconia increases with increasing TiO2 content at 1600°C, as indicated by the monoclinic (m-) zirconia content in the furnace-cooled specimens. Regardless of the modification of the lattice misfit strain by TiO2 dissolution, the precipitates of t-phase in the c-matrix remain lenticular with {1 0 0} habit plane. Loops, due probably to condensation of the structural vacancies, were found in the m-phase of 9T, but not in 1T and 6T specimens.

Keywords

Zirconia Habit Plane TiO2 Content Baddeleyite American Ceramic Society 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    D. L. Porter and A. H. Heuer, J. Amer. Ceram. Soc. 60 (1977) 183.CrossRefGoogle Scholar
  2. 2.
    C. L. Lin, P. Shen and D. Gan, J. Mater. Sci. Lett. 8 (1989) 395.CrossRefGoogle Scholar
  3. 3.
    R. H. J. Hannink, K. A. Johnston, R. T. Pascoe and R. C. Garvie, in “Advances in Ceramics”, Vol. 3, edited by A. H. Heuer and L. W. Hobbs (American Ceramic Society, Columbus, Ohio, 1981) p. 116.Google Scholar
  4. 4.
    V. Lanteri, A. H. Heuer and T. E. Mitchell, in “Advances in Ceramics”, Vol. 12, edited by N. Claussen, M. Ruhle and A. H. Heuer (American Ceramic Society, Columbus, Ohio, 1984) p. 118.Google Scholar
  5. 5.
    L. K. Lenz, MS thesis, Case Western Reserve University, Cleveland, Ohio (1982).Google Scholar
  6. 6.
    V. Lanteri, T. E. Mitchell and A. H. Heuer, J. Amer. Ceram. Soc. 69 (1986) 564.CrossRefGoogle Scholar
  7. 7.
    P. T. Chao and P. Shen, Mater. Sci. Eng. (A) 117 (1989) 191.CrossRefGoogle Scholar
  8. 8.
    R. R. Lee and A. H. Heuer, J. Amer. Ceram. Soc. 70 (1987) 208.CrossRefGoogle Scholar
  9. 9.
    A. G. Khachaturyan, “Theory of Structural Transformation in Solids” (Wiley, New York, 1983).Google Scholar
  10. 10.
    L. W. Coughanour, R. S. Roth, S. Marzullo and F. E. Sennett, J. Res. Natl. Bur. Stand. (U.S.) 54(4) (1955) 191.CrossRefGoogle Scholar
  11. 11.
    C. Bateman, M. Notis and M. Harmer, in Abstracts of 88th Annual Meeting of the American Ceramic Society, Chicago, Il, USA, April 1986.Google Scholar
  12. 12.
    R. D. Shannon, Acta Crystallogr. A32 (1976) 751.CrossRefGoogle Scholar
  13. 13.
    N. T. McDevitt and W. L. Baun, J. Amer. Ceram. Soc. 47 (1964) 622.CrossRefGoogle Scholar
  14. 14.
    C. M. Phillippi and K. S. Mazdiyasni, ibid. 54 (1971) 254.CrossRefGoogle Scholar
  15. 15.
    C. Bateman, M. Notis and C. Lyman, in 89th Annual Meeting Ceramographic Exhibit of the American Ceramic Society, Pittsburgh, PA, USA, April 1987.Google Scholar
  16. 16.
    R. W. Balluffi and J. W. Cahn, Acta Metall. 29 (1981) 493.CrossRefGoogle Scholar
  17. 17.
    B. C. Muddle and R. H. J. Hannink, J. Amer. Ceram. Soc. 69 (1986) 547.CrossRefGoogle Scholar
  18. 18.
    F. Massazza and E. Sirchia, Chim. Ind. (Milan) 40 (1958) 378.Google Scholar
  19. 19.
    F. H. Brown and P. Duwez, J. Amer. Ceram. Soc. 37 (1954) 132.Google Scholar
  20. 20.
    C. L. Lin, D. Gan and P. Shen, Mater. Sci. Eng. A 129 (1990) 147.CrossRefGoogle Scholar
  21. 21.
    M. Ruhle and A. H. Heuer, in “Advances in Ceramics”, Vol. 12, edited by N. Claussen, M. Ruhle and A. H. Heuer (American Ceramic Society, Columbus, Ohio, 1984) p. 14.Google Scholar
  22. 22.
    R. W. Lynch and B. Morosin, J. Amer. Ceram. Soc. 55 (1972) 409.CrossRefGoogle Scholar
  23. 23.
    R. Chaim and D. G. Bandon, in “Advances in Ceramics”, Vol. 12, edited by N. Claussen, M. Ruhle and A. H. Heuer (American Ceramic Society, Columbus, Ohio, 1984) p. 86.Google Scholar
  24. 24.
    P. Shen, D. Gan and S. L. Hwang, Mater. Sci. Eng. A 101 (1988) 143.Google Scholar

Copyright information

© Chapman & Hall 1991

Authors and Affiliations

  • W. S. Lee
    • 1
  • A. C. Su
    • 1
  • P. Shen
    • 1
  1. 1.Institute of Materials Science and EngineeringNational Sun Yat-Sen UniversityKaohsiungTaiwan

Personalised recommendations