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Journal of Materials Science

, Volume 18, Issue 12, pp 3765–3772 | Cite as

Crystallization characteristics of an amorphous Ti80Si20 alloy at high pressures

  • W. K. Wang
  • H. Iwasaki
  • C. Suryanarayana
  • T. Masumoto
Papers

Abstract

Amorphous Ti-20 at% Si alloy, prepared by rapid quenching from the molten state, was annealed while being subjected to a pressure of 10GPa. X-ray diffraction investigations on the alloy specimens quenched to ambient conditions have shown that pressure greatly alters the crystallization characteristics and a body-centered cubic solid solution having the same composition as that of the parent amorphous matrix forms preferentially at temperatures in the range from 400 to 550° C. The lattice constant of this supersaturated solid solution suggests that silicon atoms are dissolved substitutionally in the titanium lattice. It is not until the temperature is raised to above 550° C that the amorphous matrix decomposes into a bcc solid solution containing less amount of silicon and a silicon-rich phase. Discussion is given on the mode of crystallization on the basis of the present results and those of previous studies and it has been shown that the crystallization of amorphous alloys can be classified into three types depending on pressure and temperature.

Keywords

Silicon Titanium Crystallization Solid Solution Lattice Constant 
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.

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References

  1. 1.
    C. Suryanarayana, “Rapidly Quenched Metals — A Bibliography 1973–1979” (IFI/Plenum, New York, 1980).Google Scholar
  2. 2.
    C. Suryanarayana, A. Inoue and T. Masumoto, J. Mater. Sci. 15 (1980) 1993.Google Scholar
  3. 3.
    H. Iwasaki and T. Masumoto, ibid. 13 (1978) 2171.Google Scholar
  4. 4.
    W. K. Wang, H. Iwasaki and K. Fukamichi, ibid. 15 (1980) 2701.Google Scholar
  5. 6.
    W. K. Wang, Y. Syono, T. Goto, H. Iwasaki, A. Inoue and T. Masumoto, Scripta Metall. 15 (1981) 1313.Google Scholar
  6. 7.
    W. K. Wang, H. Iwasaki, C. Suryanarayana, T. Masumoto, K. Fukamichi, Y. Syono and T. Goto, in Proceedings of 4th International Conference Rapidly Quenched Metals, Sendai, August 1981, edited by T. Masumoto and K. Suzuki (The Japan Institute of Metals, Sendai, 1982) p. 663.Google Scholar
  7. 8.
    H. Iwasaki, W. K. Wang, N. Toyota, T. Fukase, H. Fujimori, Y. Akahama and S. Endo, Solid State Commun. 42 (1982) 381.Google Scholar
  8. 9.
    W. K. Wang, H. Iwasaki, C. Suryanarayana, T. Masumoto, N. Toyota, T. Fukase and F. Kogiku, J. Mater. Sci. 17 (1982) 1523.Google Scholar
  9. 10.
    W. K. Wang, Thesis, Tohoku University (1982).Google Scholar
  10. 11.
    H. Iwasaki, Sci. Rep. RITU A31 (1983) 1.Google Scholar
  11. 12.
    A. Inoue, S. Sakai, H. M. Kimura and T. Masumoto, Trans. Jpn. Inst. Met 20 (1979) 255.Google Scholar
  12. 13.
    H. Iwasaki, Y. Watanabe and S. Ogawa, J. Appl. Crystallogr. 7 (1974) 611.Google Scholar
  13. 14.
    W. B. Pearson, “A Handbook of Lattice Spacings and Structures of Metals and Alloys”, Vol. 2 (Pergamon Press, Oxford, 1967) p. 1279.Google Scholar
  14. 15.
    J. N. Plendel and P. J. Gielisse, Phys. Status solidi 42 (1970) 681.Google Scholar
  15. 16.
    H. W. King, in “Alloying Behaviour and Effects in Concentrated Solid Solutions”, edited by T. B. Massalski (Gordon and Breach, New York, 1965) p. 85.Google Scholar
  16. 17.
    W. Klement Jr. and A. Jayaraman, in “Progress in Solid State Chemistry”, Vol. 3, edited by H. Reiss (Pergamon Press, Oxford, 1967) p. 316.Google Scholar
  17. 18.
    M. Hansen, “Constitution of Binary Alloys” 2nd edn (McGraw-Hill, New York, 1958) p. 1198.Google Scholar
  18. 19.
    E. S. Machlin and S. H. Whang, J. Phys. Chem. Solids 37 (1976) 555.Google Scholar
  19. 20.
    E. S. Machlin, Acta Metall. 24 (1976) 543.Google Scholar
  20. 21.
    Idem, ibid. 22 (1974) 95.Google Scholar

Copyright information

© Chapman and Hall Ltd 1983

Authors and Affiliations

  • W. K. Wang
    • 1
  • H. Iwasaki
    • 1
  • C. Suryanarayana
    • 1
  • T. Masumoto
    • 1
  1. 1.The Research Institute for Iron, Steel and Other MetalsTohoku UniversitySendaiJapan

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