Hostname: page-component-745bb68f8f-hvd4g Total loading time: 0 Render date: 2025-01-27T16:12:55.184Z Has data issue: false hasContentIssue false
  • English
  • Français

Percolation Effects in the Mechanical Properties of Granular Ni-A12O3 thin films

Published online by Cambridge University Press:  28 February 2011

T.E. Schlesinger ,
A. Gavrin ,
R.C. Cammarata  and
C.-L. Chien
T.E. Schlesinger
Affiliation:
Department of Materials Science and Engineering, The Johns Hopkins University, Baltimore, MD 21218
A. Gavrin
Affiliation:
Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218
R.C. Cammarata
Affiliation:
Department of Materials Science and Engineering, The Johns Hopkins University, Baltimore, MD 21218
C.-L. Chien
Affiliation:
Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218
Get access

Abstract

The mechanical properties of sputtered Ni-Al2O3 granular thin films were investigated by low load microharaness testing. It was found that the microhardness of these films displayed a percolation threshold at a nickel volume fraction of about 0.6, below which the hardness is greatly enhanced. This behavior is qualitatively similar to the electrical and magnetic properties of these types of films. A percolation threshold in hardness can be understood as due to a change in the mechanism for plastic deformation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 195: Symposium S – Physical Phenomena in Granular Materials , 1990 , 441
Copyright
Copyright © Materials Research Society 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Abeles, B., Sheng, P., Couts, M.D., and Arie, Y., Adv. Phys. 24, 407 (1975).Google Scholar
2. Sheng, Ping, Phys. Rev. B 31, 4906 (1985).Google Scholar
3. Shoenberg, D., Superconductivity (Cambridge University Press, London, 1962).Google Scholar
4. Chien, C.-L., in Recent Advances in Magnetism and Magnetic Materials, edited by Huang, H.L. and Kuo, P.C. (World Scientific, Singapore, 1990) p. 296.Google Scholar
5. Abeles, B., in Applied Solid State Science: Advances in Materials and Device Research, edited by Wolfe, R. (Academic, New York, 1976) pg. 1.Google Scholar
6. Dieter, G., Mechanical Metallurgy, (McGraw-Hill, New York, 1986).Google Scholar