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首页> 外文期刊>Journal of Materials Research >Nanoindentation testing for evaluating modulus and hardness of single-walled carbon nanotube-reinforced epoxy composites
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Nanoindentation testing for evaluating modulus and hardness of single-walled carbon nanotube-reinforced epoxy composites

机译：纳米压痕测试，用于评估单壁碳纳米管增强的环氧复合材料的模量和硬度

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摘要

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 percent) 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.
机译：仪器压痕测试用于评估使用低粘度液态环氧树脂的纳米管的重量百分比（0、0.1、0.5和1.0重量％）变化时单壁碳纳米管复合材料样品的机械性能变化。使用激光烧蚀技术制备纳米管。还对相同样品进行了参考拉伸试验，并与压痕结果进行了相关比较。使用纳米压痕获得的模量和硬度变化（考虑时间效应）显示出各种复合材料样品之间的可量化差异，但与拉伸试验数据不同。碳纳米管复合材料的观察到的刚度和断裂强度的微小变化是由于束的形成，其弯曲的形态和样品中的微孔性所致。从模量的解释值与压痕深度获得的有趣波动是由于纳米管束的局部约束作用程度不同而引起的。这些纳米复合材料的蠕变指数也进行了评估，并显示出很大的改进。

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  • 来源
    《Journal of Materials Research》 |2004年第1期|p.158-164|共7页
  • 作者

    A.K. Dutta; D. Penumadu; B. Files;

  • 作者单位

    Civil and Environmental Engineering Department, The University of Tennessee, Knoxville, Tennessee 37996-2010;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

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