Journal of Materials Science

, Volume 25, Issue 7, pp 3149–3154 | Cite as

Formation of amorphous Al-Cr alloys by mechanical alloying of elemental aluminium and chromium powders

  • Kojiro F. Kobayashi
  • Nobuo Tachibana
  • Paul H. Shingu
Papers
Received:
Accepted:

Abstract

Mechanical alloying (MA) of elemental aluminium and chromium powders has been performed using a conventional ball-mill. The MA process produces composite metal powders and homogeneously alloyed powders. During continuous heating at the rate of 0.33 K sec−1 Al-15 at% Cr samples ball-milled for 800 and 1000 h showed two exothermal peaks. The first peak which appeared at the lower temperature corresponds to amorphization of the MA powders. It was confirmed by X-ray and transmission electron microscopy that the heattreated powders, quenched from a temperature just above the first peak, were amorphous phase. Amorphous Al-Cr alloys were formed using elemental powders by MA and subsequent heat treatment.

Keywords

Transmission Electron Microscopy Chromium Heat Treatment Amorphous Phase Exothermal Peak 
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.
This is a preview of subscription content, log in to check access.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    C. C. Koch, O. B. Cavin, C. G. McKamey andJ. O. Scarbrough,Appl. Phys. Lett. 43 (1983) 1017.Google Scholar
  2. 2.
    R. B. Schwarz, R. R. Petrich andC. K. Saw,J. Non-Cryst. Solids 76 (1985) 281.Google Scholar
  3. 3.
    E. Hellstern andL. Schultz,Appl. Phys. Lett. 48 (1986) 124.Google Scholar
  4. 4.
    R. B. Schwarz andC. C. Koch,ibid. 49 (1986) 146.Google Scholar
  5. 5.
    R. B. Schwarz andR. R. Petrich,J. Less-Common Metals 140 (1988) 171.Google Scholar
  6. 6.
    A. W. Weeber andH. Barker,Phys. B 153 (1988) 93.Google Scholar
  7. 7.
    L. Schultz,Mater. Sci. Engng 97 (1988) 15.Google Scholar
  8. 8.
    A. W. Weeber andH. Bakker,ibid. 97 (1988) 133.Google Scholar
  9. 9.
    A. W. Weeber, P. I. Loeff andH. Bakker,Trans. J. Inst. Metals 29 (1988) 45.Google Scholar
  10. 10.
    R. B. Schwarz andW. L. Johnson,Phys. Rev. Lett. 51 (1983) 415.Google Scholar
  11. 11.
    S. R. Herd, K. N. Tu andK. Y. Ahn,Appl. Phys. Lett. 42 (1983) 597.Google Scholar
  12. 12.
    W. L. Johnson,Prog. Mater. Sci. 30 (1986) 81.Google Scholar
  13. 13.
    X. L. Yeh, K. Samwer andW. L. Johnson,Appl. Phys. Lett. 42 (1983) 242.Google Scholar
  14. 14.
    K. F. Kobayashi, N. Tachibana andP. H. Shingu,J. Mater. Sci. 1990 (in press).Google Scholar
  15. 15.
    J. S. Benjamin,Sci. Amer 234 (1976) 40.Google Scholar
  16. 16.
    T. B. Massalski, J. L. Murray, L. H. Bennett andH. Baker, “Binary Alloy Phase Diagrams”, Vol. 1 (American Society for Metals, Metals Park, Ohio, 1986) pp. 104.Google Scholar
  17. 17.
    K. F. Kobayashi, N. Tachibana andP. H. Shingu,J. Mater. Sci. 24 (1989) 2437.Google Scholar
  18. 18.
    H. W. Wing,ibid. 1 (1966) 79.Google Scholar
  19. 19.
    R. Hultgren, P. D. Desai, D. T. Hawkins, M. Gleiser andK. K. Kelley, “Selected Values of the Thermodynamic Properties of Binary Alloys” (American Society for Metals, Metals Park, Ohio, 1973) p. 148.Google Scholar
  20. 20.
    H. E. Kissinger,Anal. Chem. 29 (1957) 1702.Google Scholar

Copyright information

© Chapman and Hall Ltd 1990

Authors and Affiliations

  • Kojiro F. Kobayashi
    • 1
  • Nobuo Tachibana
    • 2
  • Paul H. Shingu
    • 2
  1. 1.Department of Welding and Production EngineeringOsaka UniversitySuitaJapan
  2. 2.Department of Metal Science and TechnologyKyoto UniversityKyotoJapan

Personalised recommendations