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Suppressing unstable deformation of nanocolloidal crystals with atomic layer deposition

机译:通过原子层沉积抑制纳米胶体晶体的不稳定变形

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摘要

Despite their useful photonic properties, poor mechanical robustness hinders the application of nanocolloidal crystals (NCCs). Understanding the mechanical behavior of NCCs is critical to propose effective reinforcement techniques. We find that as-assembled NCCs exhibit unstable deformation, manifested as pop-ins upon nanoindentation. By deepening indentation, the unstable deformation mode transitions from NC dislodging to shear band (SB) formation. We find that alumina atomic layer deposition (ALD) significantly suppresses NC dislodging and SB formations in NCCs by increasing interparticle bonding.
机译:尽管它们具有有用的光子特性,但较差的机械强度却阻碍了纳米胶体晶体(NCC)的应用。了解NCC的机械性能对于提出有效的加固技术至关重要。我们发现,组装后的NCC表现出不稳定的变形,表现为纳米压痕弹出。通过加深压痕,不稳定变形模式从NC位移过渡到剪切带(SB)形成。我们发现氧化铝原子层沉积(ALD)通过增加粒子间键合显着抑制NCC中的NC脱落和SB形成。

著录项

  • 来源
    《Materials Science and Engineering》 |2015年第15期|514-518|共5页
  • 作者单位

    Department of Mechanical Engineering, Villanova University, Villanova, PA 19085, USA;

    Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA,Department of Mechanical Engineering, University of Alaska Fairbanks, Fairbanks, AK 99775, USA;

    Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA;

    Department of Physics, Bryn Mawr College, Bryn Mawr, PA 19010, USA;

    Department of Mechanical Engineering, Villanova University, Villanova, PA 19085, USA;

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

    Nanoindentation; Shear bands; Mechanical characterization; Nanostructured materials; Granular materials;

    机译:纳米压痕剪切带;机械特性纳米结构材料;粒状材料;

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