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

机译：通过纳米压痕表征软基质中单个颗粒的杨氏模量的新颖简单方法

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摘要

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.
机译：关于诸如锂离子电极材料之类的颗粒-基质复合材料的微机械特性，我们利用纳米压痕技术来量化直径为几微米的单个陶瓷颗粒的杨氏模量，该方法嵌入到较软的聚合物中。矩阵。对于实验，我们使用的参考复合材料具有高杨氏模量和高达100（颗粒/基体）的高硬度比，填料含量分别为10和80 vol％。我们进一步进行了有限元模拟，以了解单个颗粒的压痕过程。已经发现，取决于填料含量，粒度和颗粒/基质性质，当通过纳米压痕表征单个颗粒时，可能出现高达75％的显着误差。最后，我们通过使用带有常规数据分析的标准纳米压痕方法以及其他后处理评估来确定单个粒子的杨氏模量，提出了一个框架，并讨论了其局限性。

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  • 来源
    《Journal of Materials Research》 |2012年第24期|3073-3082|共10页
  • 作者

    D. Leisen; I. Kerkamm; E. Bohn; M. Kamlah;

  • 作者单位

    Karlsruhe Institute of Technology, Institute for Applied Materials, 76344 Eggenstein-Leopoldshafen, Germany;

    Robert Bosch GmbH, Corporate Sector Research and Advance Engineering, 70049 Stuttgart, Germany;

    Robert Bosch GmbH, Corporate Sector Research and Advance Engineering, 70049 Stuttgart, Germany;

    Karlsruhe Institute of Technology, Institute for Applied Materials, 76344 Eggenstein-Leopoldshafen, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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