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Effects of focused-ion-beam irradiation and prestraining on the mechanical properties of FCC Au microparticles on a sapphire substrate

Published online by Cambridge University Press:  26 July 2011

Seok-Woo Lee ,
Dan Mordehai ,
Eugen Rabkin  and
William D. Nix
Seok-Woo Lee*
Affiliation:
Department of Materials Science and Engineering, Stanford University, Stanford, California 94305-4034
Dan Mordehai
Affiliation:
Department of Materials Engineering, Technion-Israel Institute of Technology, 32000 Haifa, Israel
Eugen Rabkin
Affiliation:
Department of Materials Engineering, Technion-Israel Institute of Technology, 32000 Haifa, Israel
William D. Nix
Affiliation:
Department of Materials Science and Engineering, Stanford University, Stanford, California 94305-4034
*
a)Address all correspondence to this author. e-mail address: [email protected]
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Abstract

We have studied the effects of focused-ion-beam (FIB) irradiation and prestraining on the mechanical properties of nearly defect-free Au microparticles on a sapphire substrate. The Au microparticles, which were produced by a solid-state diffusion dewetting technique, were FIB-irradiated and/or prestrained, the latter using a nanoindenter with a flat ended punch operating under a nanohammering mode. Also, the prestrained Au microparticles were exposed to FIB to examine the effects of ion-beam damage on the properties of crystals containing mobile dislocations. We found that both FIB irradiation and prestraining reduced the yield strength of pristine Au microparticles significantly and made the stress–strain curves jerky. However, FIB irradiation does not affect the mechanical properties of prestrained Au microparticles very significantly. Once a microparticle contains mobile dislocations, its mechanical properties are not influenced much by the defects generated by FIB irradiation, even at the submicrometer scale.

Keywords

DislocationsStrengthRadiation effects
Type
Invited feature paper
Information
Journal of Materials Research , Volume 26 , Issue 14 , 28 July 2011 , pp. 1653 - 1661
Copyright
Copyright © Materials Research Society 2011

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References

REFERENCES

1.Nix, W.D., Greer, J.R., Feng, G., and Lilleodden, E.T.: Deformation at the nanometer and micrometer length scales: Effects of strain gradients and dislocation starvation. Thin Solid Films 515, 3152 (2007).CrossRefGoogle Scholar
2.Uchic, M.D., Dimiduk, D.M., Florando, J.N., and Nix, W.D.: Sample dimensions influence strength and crystal plasticity. Science 305, 986 (2004).CrossRefGoogle ScholarPubMed
3.Greer, J.R., Oliver, W.C., and Nix, W.D.: Size dependence of mechanical properties of gold at the micron scale in the absence of strain gradients. Acta Mater. 53, 1821 (2005).CrossRefGoogle Scholar
4.Volkert, C.A. and Lilleodden, E.T.: Size effects in the deformation of sub-micron Au columns. Philos. Mag. 86, 5567 (2006).CrossRefGoogle Scholar
5.Kiener, D., Motz, C., Rester, M., Jenko, M., and Dehm, G.: FIB damage of Cu and possible consequences for miniaturized mechanical tests. Mater. Sci. Eng., A 459, 262 (2007).CrossRefGoogle Scholar
6.Bei, H., Shim, S., George, E.P., Miller, M.K., Herbert, E.G., and Pharr, G.M.: Compressive strengths of molybdenum alloy micro-pillars prepared using a new technique. Scr. Mater. 57, 397 (2007).CrossRefGoogle Scholar
7.Richter, G., Hillerich, K., Gianola, D.S., Mönig, R., Kraft, O., and Volkert, C.A.: Ultrahigh strength single crystalline nanowhiskers grown by physical vapor deposition. Nano Lett. 9, 3048 (2009).CrossRefGoogle ScholarPubMed
8.Jennings, A.T., Burek, M.J., and Greer, J.R.: Microstructure versus size: Mechanical properties of electroplated single crystalline Cu nanopillars. Phys. Rev. Lett. 104, 135503 (2010).CrossRefGoogle ScholarPubMed
9.Sadan, H. and Kaplan, W.D.: Au–Sapphire (0001) solid–solid interfacial energy. J. Mater. Sci. 41, 5099 (2006).CrossRefGoogle Scholar
10.Mordehai, D., Kazakevich, M., Srolovitz, D.J., and Rabkin, E.: Nanoindentation size effect in single-crystal nanoparticle and thin films: A comparative experimental and simulation study. Acta Mater. 59, 2309 (2011).CrossRefGoogle Scholar
11.Bei, H., Shim, S., Pharr, G.M., and George, E.P.: Effects of pre-strain on the compressive stress–strain response of Mo-alloy single-crystal micropillars. Acta Mater. 56, 4762 (2008).CrossRefGoogle Scholar
12.Shim, S., Bei, H., Miller, M.K., Pharr, G.M., and George, E.P.: Effects of focused-ion-beam milling on the compressive behavior of directionally solidified micropillars and the nanoindentation response of an electropolished surface. Acta Mater. 57, 503 (2009).CrossRefGoogle Scholar
13.Mordehai, D., Lee, S-W., Eckert, B., Srolovitz, D.J., Nix, W.D., and Rabkin, E.: Size effect in compression of single-crystal gold microparticles. Acta Mater. 59, 5202 (2011).CrossRefGoogle Scholar
14.Lee, S-W., Han, S.M., and Nix, W.D.: Uniaxial compression of fcc Au nanopillars on an MgO substrate: The effects of prestraining and annealing. Acta Mater. 57, 4404 (2009).CrossRefGoogle Scholar
15.Greer, J.R. and Nix, W.D.: Nanoscale gold pillars strengthened through dislocation starvation. Phys. Rev. B 73, 245410 (2006).CrossRefGoogle Scholar
16.Brinckmann, S., Kim, J-Y., and Greer, J.R.: Fundamental differences in mechanical behavior between two types of crystals at the nanoscale. Phys. Rev. Lett. 100, 155502 (2008).CrossRefGoogle ScholarPubMed
17.Ziegler, J.F., Biersack, J.P., and Littmark, U.: The Stopping Range of Ions in Matter (Pergamon Press, New York, 1985), p. 321.Google Scholar
18.El-Awady, J.A., Woodward, C., Dimiduk, D.M., and Ghoniem, N.M.: Effects of focused ion beam induced damage on the plasticity of micropillars. Phys. Rev. B 80, 104104 (2009).CrossRefGoogle Scholar