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Morphology, tensile and fracture characteristics of epoxy-alumina nanocomposites

机译：环氧-氧化铝纳米复合材料的形貌，拉伸和断裂特性

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摘要

The paper presents studies of the morphology, mechanical properties and fracture behavior of epoxy-alumina nanocomposites; the influences of alumina particle's shapes and sizes are discussed. Alumina particles (pre-treated with surface modifier) of platelet- and rod-shapes ranging from 10-40 nm in size are introduced into epoxy resin. It is found that the dispersion of the nano-sized alumina particle within the epoxy matrix mainly depends on the geometry of the particle. Mechanical characterization and fracture mechanics tests show that the tensile modulus, tensile strength and fracture toughness are affected by the geometry of the particles. The fracture surface investigation shows that several toughening mechanisms, including particles pull-out, crack pinning, plastic yielding and deformation are the main factors for the increments of the fracture toughness of the epoxy-Alumina nanocomposites.
机译：本文对环氧-氧化铝纳米复合材料的形貌，力学性能和断裂行为进行了研究。讨论了氧化铝颗粒形状和尺寸的影响。将尺寸为10-40 nm的片状和棒状的氧化铝颗粒（用表面改性剂预处理）引入环氧树脂。发现纳米尺寸氧化铝颗粒在环氧基质内的分散主要取决于颗粒的几何形状。机械表征和断裂力学测试表明，拉伸模量，拉伸强度和断裂韧性受颗粒几何形状的影响。断裂表面研究表明，几种增韧机制，包括颗粒拉出，裂纹钉扎，塑性屈服和变形是环氧-氧化铝纳米复合材料断裂韧性增加的主要因素。

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  • 来源
    《Materials Science and Engineering》 |2010年第22期|P.5670-5676|共7页
  • 作者

    S.H. Lim; K.Y. Zeng; C.B. He;

  • 作者单位

    Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1,117576, Singapore Institute of Materials Research and Engineering, 3 Research Link, 117602, Singapore;

    Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1,117576, Singapore;

    Institute of Materials Research and Engineering, 3 Research Link, 117602, Singapore;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    epoxy nanocomposites; facture toughness; fracture surface;

    机译：环氧纳米复合材料;断裂韧性断裂面;

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