Hostname: page-component-8448b6f56d-xtgtn Total loading time: 0 Render date: 2024-04-23T13:31:29.165Z Has data issue: false hasContentIssue false
  • English
  • Français

Nanoindentation testing for evaluating modulus and hardness of single-walled carbon nanotube–reinforced epoxy composites

Published online by Cambridge University Press:  03 March 2011

A.K. Dutta ,
D. Penumadu  and
B. Files
A.K. Dutta
Affiliation:
Civil and Environmental Engineering Department, The University of Tennessee, Knoxville, Tennessee 37996-2010
D. Penumadu
Affiliation:
Civil and Environmental Engineering Department, The University of Tennessee, Knoxville, Tennessee 37996-2010
B. Files
Affiliation:
ES4-Materials and Processes Branch, NASA/Johnson Space Center, Houston, Texas 77058
Get access

Abstract

Instrumented indentation testing was used to evaluate the changes in mechanical properties of single-walled carbon nanotube composite specimens with varying weight percentage (0, 0.1, 0.5, and 1.0 wt%) of nanotubes using a low-viscosity liquid epoxy resin. The nanotubes were prepared using laser ablation technique. Reference tensile tests were also performed on the same samples, and relevant comparisons with indentation results were made. The variations in modulus and hardness obtained using nanoindentation (considering time effects) showed quantifiable differences between the various composite specimens, but differed from tensile test data. The small changes in the observed stiffness and breaking strength of carbon nanotube composites was due to the formation of bundles, their curvy morphology, and microporosity in the specimens. Interesting fluctuations obtained from the interpreted values of modulus with depth of indentation is attributed to varying degrees of the local confining effect of nanotube bundles. Creep exponents for these nanocomposites were also evaluated and indicate considerable improvements.

Keywords

IndentationHardnessStructural
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 1 , January 2004 , pp. 158 - 164
Copyright
Copyright © Materials Research Society 2004

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.Iijima, S., Nature 354 56 (1991).CrossRefGoogle Scholar
2.Lau, K.T. and Hui, D., Compos. B: Eng. 33 263 (2002).CrossRefGoogle Scholar
3.Thostenson, E.T., Ren, Z. and Chou, T.W., Compos. Sci. Technol. 61 1899 (2001).CrossRefGoogle Scholar
4.Lau, K.T., Shi, S.Q. and Cheng, H.M., Compos. Sci. Technol. 63 1161 (2003).CrossRefGoogle Scholar
5.Allaoui, A., Bai, S., Cheng, H.M. and Bai, J.B., Compos. Sci. Technol. 62 1993 (2002).CrossRefGoogle Scholar
6.Haggenmueller, R., Gommans, H.H., Rinzler, A.G., Fischer, J.E. and Winey, K.I., Chem. Phys. Lett. 330 219 (2000).CrossRefGoogle Scholar
7.Ajayan, P.M., Schadler, L.S., Giannaris, C. and Rubio, A., Adv. Mater. 12 750 (2000).3.0.CO;2-6>CrossRefGoogle Scholar
8.Schadler, L.S., Giannaris, S.C. and Ajayan, P.M., Appl. Phys. Lett. 73 3842 (1998).CrossRefGoogle Scholar
9.Penumadu, D., Dutta, A., Pharr, G.M. and Files, B.S., J. Mater. Res. 18 308 (2003).CrossRefGoogle Scholar
10.Oliver, W.C. and Pharr, G.M., J. Mater. Res. 7 1564 (1992).CrossRefGoogle Scholar
11.Pollock, H.M., Maugis, D., and Barquins, M., Microindentation Tech. In Mat. Sci. & Eng. edited by Blau, P.J. and Lawn, R.ASTM 47 (Pittsburgh, PA, 1986).Google Scholar
12.Mayo, M.J., Seigel, R.W., Liao, Y.X., and Nix, W.D., J. Mater. Res. 7 (1992).CrossRefGoogle Scholar
13.Biercuk, M.J., Llaguno, M.C., Radosavljevic, M., Hyun, J.K., Johnson, A.T. and Fischer, J.E., Appl. Phys. Lett. 80 2767 (2002).CrossRefGoogle Scholar