Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-18T12:19:06.409Z Has data issue: false hasContentIssue false
  • English
  • Français

Hardness of thin Films of Nanocrystalline Silver and Nickel Composites Studied by Nanoindentation and Finite Element Analysis

Published online by Cambridge University Press:  15 February 2011

Boqin Qiu ,
Yang-Tse Cheng  and
James P. Blanchard
Boqin Qiu
Affiliation:
General Motors R&D Center, Warren, MI48090, cheng@gmr.com
Yang-Tse Cheng
Affiliation:
General Motors R&D Center, Warren, MI48090, cheng@gmr.com
James P. Blanchard
Affiliation:
University of Wisconsin, Nuclear Engineering and Engineering Physics, Madison, WI53706
Get access

Abstract

While gas condensation and mechanical alloying have been used to produce nano-phase powders, an effective method of applying these powders as coatings is still lacking. Furthermore, fundamental studies of the mechanical properties of nano-phase powders may be complicated by the porosity associated with consolidation processes. Recently, we have made nano-crystalline composite thin films of Ag-Mo and Ag-Ni by depositing two immiscible elements simultaneous onto substrates. We found, using XRD and TEM, that the average grain size varies from 10 to 100 nm by choosing an appropriate substrate temperature. Nanoindentation measurements showed the hardness of the composite is increased four times by reducing the grain-size of both phases from 100 to 10 nm. The load vs. displacement curves were simulated using a finite element method (ABAQUS). A relationship between the hardness of the two-phase composite and the yield strength of each phase is obtained.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 400: Symposium E – Metastable Metal-Based Phases and Microstructures , 1995 , 305
Copyright
Copyright © Materials Research Society 1996

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. Tung, S.C. and Cheng, Y.-T., Wear 162–164, 763 (1993); United States Patent 5,225,253 (1993).Google Scholar
2. Cheng, Y.-T., Qiu, B., Tung, S.C., Blanchard, J.P., and Drew, G., Mater. Res. Soc. Symp. Proc. Vol. 356, 875 (1995).Google Scholar
3. Lee, C.H., Masaki, S., and Kobayashi, S., Int. J. Mech. Sci. 14, 417 (1972).Google Scholar
4. Follansbee, P.S. and Sinclair, G.B., Int. J. Sol. Struc. 20, 81 (1984).Google Scholar
5. Bhattacharya, A.K. and Nix, W.D., Int. J. Sol. Struc. 24, 881 (1988).Google Scholar
6. Shih, C.W., Yang, M., and Li, J.C.M., J. Mater. Res. 6, 2623 (1991).Google Scholar
7. Afontaine, W.R., Yost, B., and Li, Che-Yu, J. Mater. Res. 5, 776 (1990).Google Scholar
8. Bhattacharya, A.K. and Nix, W.D., Int. J. Sol. Struc. 24, 1287 (1988).Google Scholar
9. Laursen, T.A. and Simo, J.C., J. Mater. Res. 7, 618 (1992).Google Scholar
10. Bourcier, R.J., Myers, S.M., and Prlonis, D.H., Nucl. Instr. Meth. B44, 278 (1990).Google Scholar
11. Bourcier, R.J., Follstaedt, D.M., Dugger, M.T., and Myers, S.M., Nucl. Instr. Meth. B59/60, 905(1991).Google Scholar
12. Blanchard, J.P., Chen, A., and Qiu, B., Nucl. Instr. Meth. B82, 63 (1993).Google Scholar
13. ABAQUS finite element program, HKS Inc., Providence, Rhode Island (1992).Google Scholar
14. Doerner, M.F. and Nix, W.D., J. of Mater. Res. 1, 601–609 (1986).Google Scholar
15. Oliver, W.C. and Pharr, G.M., J. Mater. Res. 7, 1564 (1992).Google Scholar
16. Hughes, D., Smith, S.D., Pande, C.S., Jognson, H.R., and Armstrong, R.W., Scripta Met. 20, 93(1986).Google Scholar
17. Kobelev, N.P., Soifer, Ya.M., Andrievski, R.A., and Gunther, B., Nanostructured Materials 2, 537(1993).Google Scholar
18. Qiu, B., Ph.D. thesis (1995), University of Wisconsin.Google Scholar
19. Evans, A.G. and Hirth, J.P., Scripta Meta. 26, 1675 (1992).Google Scholar