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Russian Physics Journal

, Volume 39, Issue 6, pp 548–553 | Cite as

Creep phenomena during uniaxial stretching of filamentary germanium crystals

  • A. I. Drozhzhin
  • A. P. Ermakov
Solid-State Physics

Abstract

We have studied creep phenomena occurring under a uniaxial stretch load of 104–106 Pa in initially dislocation-free filamentary p-Ge <111> crystals, both with perfect (mirror-like) and with defected (matte finish) surfaces. Tests were performed in a vacuum of 5·10−5 T, at a temperature of 1100 K. The structure of the filamentary crystals was monitored by selective and layer-by-layer etching, x-ray diffraction, metallography, and internal friction. Complete kinetic creep curves have been obtained and we have studied the fine structure of the rotations. We observe a sudden occurrence of a process, the characteristics of which depend mainly on the diameter (a size effect), and the random scatter of individual values demonstrates the statistical nature of the defects responsible for the phenomenon. In order to explain the multiplicity of dislocations observed, we have proposed a model based on breaching a macroscopic Eshelby potential barrier by an accumulation of defects which interact strongly with the free surface.

Keywords

Free Surface Kinetic Curve Thin Filament Creep Stage Creep Process 
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.
    J. Hirt and I. Lote, Theory of Dislocations [Russian translation], Atomizdat, Moscow (1972).Google Scholar
  2. 2.
    J. Fridel, Dislocations [Russian translation], Mir, Moscow (1967).Google Scholar
  3. 3.
    J. D. Eshelby, in: Boundary Problems, North Holland, Amsterdam (1979), Vol. 1, pp. 167–220.Google Scholar
  4. 4.
    A. M. Belikov, A. I. Drozhzhin, A. M. Roshchupkin, et al., Plastic Deformation of Filamentary Crystals [in Russian], Izd. VGU, Voronezh (1991).Google Scholar
  5. 5.
    V. P. Alekhin, Physics of Strength and Plasticity of Near-Surface Layers in Materials [in Russian], Nauka, Moscow (1983).Google Scholar
  6. 6.
    S. A. Antipov, I. L. Bataronov, A. I. Drozhzhin, et al., Izv. Vyssh. Uchebn., Zaved., Fiz., No. 5, 60–68 (1993).Google Scholar
  7. 7.
    S. A. Ammer, G. P. Bogoyavlenskaya, A. I. Drozhzhin, and V. S. Postnikov, Fiz. Khim. O. Mater., No. 2, 139–141 (1972).Google Scholar
  8. 8.
    A. P. Ermakov, M. I. Starovikov, S. A. Antipov, et al., Prib. Tekh. Éksp., No 6, 163–165 (1988).Google Scholar
  9. 9.
    S. A. Antipov, A. I. Drozhzhin, A. P. Ermakov, et al., Fiz. Tverd. Tela,29, No. 8, 2476–2478 (1987) [Sov. Phys. Solid State (1987)].Google Scholar
  10. 10.
    A. I. Drozhzhin and I. V. Sidel'nikov, Fiz. Tverd. Tela,23, No. 4, 894–896 (1981) [Sov. Phys. Solid State (1981)].Google Scholar
  11. 11.
    G. L. Pearson, W. T. Read, and W. L. Feldman, Acta Met.,5, No. 4, 181–191 (1957).CrossRefGoogle Scholar
  12. 12.
    G. P. Berezhkova, Filamentary Crystals [in Russian], Nauka, Moscow (1969).Google Scholar
  13. 13.
    V. M. Andronov and A. M. Gvozdikov, Metallofizika,5, No. 2, 109–111 (1983).Google Scholar
  14. 14.
    A. I. Drozhzhin, No. 3685-85, Sep. in VINITI 27.05.85, Voronezh (1985).Google Scholar
  15. 15.
    S. A. Antipov, A. I. Drozhzhin and A. M. Roshchupkin, Relaxation Phenomena in Filamentary Semiconductor Crystals [in Russian], Izd. VGU, Voronezh (1987).Google Scholar
  16. 16.
    M. A. Adams, Acta Met.,1, No. 1, 327–331 (1958).CrossRefGoogle Scholar
  17. 17.
    A. I. Drozhzhin and A. P. Ermakov, Izv. Akad. Nauk, Ser. Fiz.,57, No. 11, 106–111 (1993) [Bull Acad. Sci. USSR, Phys. Series (1993)].Google Scholar
  18. 18.
    V. S. Postnikov, A. T. Kosilov, V. B. Shepilov, and A. M. Belikov, Fiz. Khim. O. Mater., No. 4, 80–84 (1972).Google Scholar
  19. 19.
    G. V. Berezhkova, N. P. Skvortsova, P. P. Perstnev and V. R. Regel', Fiz. Tverd. Tela,26, No. 4, 1074–1079 (1984) [Sov. Fiz. Sol. St. (1984)].Google Scholar
  20. 20.
    A. I. Drozhzhin and A. P. Ermakov, Izv. Akad. Nauk, Ser. Fiz.,57, No. 11, 11–20 (1993) [Bull. Acad. Sci. USSR, Phys. Ser. (1993).Google Scholar

Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • A. I. Drozhzhin
  • A. P. Ermakov

There are no affiliations available

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