Journal of Materials Science

, Volume 25, Issue 3, pp 1603–1609 | Cite as

The mechanical properties of laminated microscale composites of Al/Al2O3

  • A. T. Alpas
  • J. D. Embury
  • D. A. Hardwick
  • R. W. Springer
Article

Abstract

The tensile properties, at both room and elevated temperatures, of laminated thin films containing alternate layers of aluminium and aluminium oxide were investigated. At room temperature the strength of the films followed a Hall-Petch type relationship dependent on the interlamellar spacing, and the strength could be extrapolated from data for conventional grain size aluminium. At the finest interlayer spacing of 50 nm, the strength was equivalent toμ/70, whereμ is the shear strength of aluminium and the samples exhibited very extensive ductility. At elevated temperatures, cavitation became an important deformation mechanism but it occurred preferentially at Al/Al rather than Al/Al2O3 boundaries. The microstructure of the films was probed using transmission electron microscopy and fractography was used to investigate deformation and fracture mechanisms.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    R. W. Springer andD. S. Catlett,Thin Solid Films 54 (1978) 197.Google Scholar
  2. 2.
    D. A. Hardwick, C. J. Maggiore andR. W. Springer,Nucl. Instrum. Meth. B15 (1986) 260.Google Scholar
  3. 3.
    R. S. Rivlin andA. G. Thomas,J. Polym. Sci. 10 (1953) 291.Google Scholar
  4. 4.
    E. O. Hall,Proc. Phys. Soc., Lond. B64 (1951) 747.Google Scholar
  5. 5.
    N. J. Petch,J. Iron and Steel Inst. 174 (1953) 25.Google Scholar
  6. 6.
    A. T. Alpas, L. Edwards andC. N. Reid,Acta Metall. 35 (1987) 787.Google Scholar
  7. 7.
    R. P. Carreker andW. H. Hibbard,Trans. AIME 209 (1957) 1157.Google Scholar
  8. 8.
    N. Hansen,Acta Metall. 25 (1977) 863.Google Scholar
  9. 9.
    H. Fujita andT. Tabata,Acta Metall. 21 (1973) 355.Google Scholar
  10. 10.
    A. W. Thompson andM. I. Baskes,Phil. Mag. 28 (1973) 301.Google Scholar
  11. 11.
    M. F. Ashby,Acta Metall. 20 (1972) 887.Google Scholar
  12. 12.
    M. Murakami,Thin Solid Films 55 (1978) 101.Google Scholar
  13. 13.
    M. F. Ashby, C. Gandhi andD. M. R. Taplin,Acta Metall. 27 (1979) 699.Google Scholar

Copyright information

© Chapman and Hall Ltd 1990

Authors and Affiliations

  • A. T. Alpas
    • 1
  • J. D. Embury
    • 1
  • D. A. Hardwick
    • 2
  • R. W. Springer
    • 2
  1. 1.Department of Materials Science and EngineeringMcMaster UniversityHamiltonCanada
  2. 2.Materials Science and Technology DivisionLos Alamos National LaboratoryLos AlamosUSA

Personalised recommendations