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A novel and simple approach for characterizing the Young’s modulus of single particles in a soft matrix by nanoindentation

Published online by Cambridge University Press:  17 December 2012

D. Leisen ,
I. Kerkamm ,
E. Bohn  and
M. Kamlah
D. Leisen*
Affiliation:
Karlsruhe Institute of Technology, Institute for Applied Materials, 76344 Eggenstein-Leopoldshafen, Germany
I. Kerkamm
Affiliation:
Robert Bosch GmbH, Corporate Sector Research and Advance Engineering, 70049 Stuttgart, Germany
E. Bohn
Affiliation:
Robert Bosch GmbH, Corporate Sector Research and Advance Engineering, 70049 Stuttgart, Germany
M. Kamlah
Affiliation:
Karlsruhe Institute of Technology, Institute for Applied Materials, 76344 Eggenstein-Leopoldshafen, Germany
*
a)Address all correspondence to this author. e-mail: daniel.leisen@kit.edu
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Abstract

With regard to the micromechanical characterization of particle–matrix composites like Li-ion electrode materials, we utilized nanoindentation technique as a method for quantifying the Young’s modulus of a single ceramic particle with a diameter of a few micrometers, which was embedded in a softer polymeric matrix. For the experiments, we used reference composites having high Young’s modulus and high hardness ratios of up to 100 (particle/matrix) and filler contents of 10 and 80 vol%. We further performed finite element simulations to understand the indentation process of single particles. It was found that depending on filler content, particle size, and particle/matrix properties, a significant error up to 75% may occur when characterizing single particles by nanoindentation. We finally propose a framework by using standard nanoindentation methods with conventional data analysis as well as an additional postprocess evaluation to determine the Young’s modulus of single particles and we discuss its limitations.

Keywords

nano-indentationcompositeelastic properties
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 24 , 28 December 2012 , pp. 3073 - 3082
Copyright
Copyright © Materials Research Society 2012

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References

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