Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-30T23:59:19.370Z Has data issue: false hasContentIssue false
  • English
  • Français

Scratch Deformation Response of Thin Cnx Coatings at Ultra-Low Loads

Published online by Cambridge University Press:  10 February 2011

S. V. Hainsworth ,
S. J. Bull  and
T. F. Page
S. V. Hainsworth
Affiliation:
Now at: Department of Engineering, University of Leicester, Leicester, LE 1 7RH, UK.
S. J. Bull
Affiliation:
Materials Division, University of Newcastle upon Tyne, Newcastle upon Tyne, NEI 7RU, UK.
T. F. Page
Affiliation:
Materials Division, University of Newcastle upon Tyne, Newcastle upon Tyne, NEI 7RU, UK.
Get access

Abstract

The scratch test is often used for assessing the properties of coated systems since it readily allows the differing dominance of various deformation mechanisms - and the friction response - to be measured as a function of contact severity. Further, the scratch test can be used to determine a critical load at which failure of the coating-substrate interface occurs and thus give a semiquantitative measure of the adhesion of the coating. Usually, micro- and macro-scratch tests arc performed in the load range between 0.05N to 100N but here, to explore the response of a much thinner coating (300nm of CNX on silicon), we report on scratches made with loads between I and 20rnN. We have found a load dependent transition in the scratch and friction responses. Below 4mN, the scratches exhibited a completely elastic response with no evidence of failure. At 5mN, the scratches showed some completely elastic areas and some areas that were typical of a buckle failure of the coating and at the same tirne, the coefficient of friction rose from ˜0.1 to ˜0.5. Above 5mN, the scratches showed a continuous plastic groove and buckle-type failure. We discuss these results in relation to the scratch response and tribology of ultra-thin films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 522: Symposium T – Fundamentals of Nanoindentation & Nanotribology , 1998 , 433
Copyright
Copyright © Materials Research Society 1998

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

1. Bull, S.J., Tribology International (1997) 30, 491–498.Google Scholar
2. Steinmann, P. A., Tardy, Y. and Hintermann, H. E., Thin Solid Films (1987) 154, 333–349.Google Scholar
3. Liu, A.Y. and Cohen, M.L., Science (1989) 245, 841–842.Google Scholar
4. Hainsworth, S.V., Sjöstrom, H., Page, T. F. and Sundgren, J.-E., Mat. Res. Soc. Symp. Proc. (1997) 436, 275–280.Google Scholar
5. Valli, J., J. Vac. Sci. Technol. A (1986) 6, 3007–3014.Google Scholar
6. Bull, S.J., Materials Science Forum (1997) 246, 105–152.Google Scholar
7. Je, J.H., Gyarmati, E. and Naoumidis, A., Thin Solid Films (1986) 136, 57–67.Google Scholar
8. Deng, H., Scharf, T.W. and Barnard, J.A., J. Appl. Phys. (1997) 81, 1–3.Google Scholar
9. Deng, H., Scharf, T. W. and Barnard, J. A., IEEE Transactions on Magnetics (1997) 33, 3151–3153.Google Scholar
10. Hay, J. L., White, R. L., Lucas, B. N. and Oliver, W. C., Mat. Res. Soc. Symp. Proc. (1998) 505 (in press).Google Scholar
11. Sjöstrom, H., Hultman, L., Sundgren, J.-E., Hainsworth, S.V., Page, T.F. and Theunissen, G. S. A. M., J. Vac. Sci. Technol. A (1996) 14, 1–7.Google Scholar
12. Sjöstrom, H., Ivanov, I., Johansson, M., Hultman, L., Sundgren, J.-E., Hainsworth, S. V., Page, T. F. and Wallenberg, L.R., Thin Solid Films (1994) 246, 103–109.Google Scholar
13. Bowden, F.P. and Tabor, D., The Friction and Lubrication of Solids. 1954, Clarendon Press, Oxford.Google Scholar
14. Sin, H., Saka, N. and Suh, N. P., Wear (1979) 55, 163–190.Google Scholar
15. Hainsworth, S. V., Whitehead, A. J. and Page, T. F., in Plastic Deformation of Ceramics III. 1995. Eds. Bradt, R. C. et al, Plenum Press, New York, p 173–184 Google Scholar
16. Bull, S. J. and Korsunsky, A. M., Tribology International, in press, (1998).Google Scholar