Heterogeneity in the Small-Scale Deformation Behavior of Disordered Nanoparticle Packings

被引：9

作者：

Lefever, Joel A. ^{[1
]}

Jacobs, Tevis D. B. ^{[1
,4
]}

Tam, Qizhan ^{[2
]}

Hor, Jyo Lyn ^{[3
]}

Huang, Yun-Ru ^{[3
,5
]}

Lee, Daeyeon ^{[3
]}

Carpick, Robert W. ^{[2
]}

机构：

[1] Univ Penn, Dept Mat Sci & Engn, 3231 Walnut St, Philadelphia, PA 19104 USA

[2] Univ Penn, Dept Mech Engn & Appl Mech, Philadelphia, PA 19104 USA

[3] Univ Penn, Dept Biomol & Chem Engn, Philadelphia, PA 19104 USA

[4] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA

[5] Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA

来源：

NANO LETTERS | 2016年 / 16卷 / 04期

关键词：

Disordered nanoparticle packing; amorphous material; atomic force microscopy; nanoindentation; soft spot; shear transformation zone; BULK METALLIC-GLASS; MECHANICAL-PROPERTIES; ELASTIC-MODULUS; PLASTIC-FLOW; INDENTATION; HARDNESS; FILMS; LOAD;

D O I：

10.1021/acs.nanolett.5b05319

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Atomic force microscopy-based nanoindentation is used to image and probe the local mechanical properties of thin disordered nanoparticle packings. The probed region is limited to the size of a few particles, and an individual particle can be loaded and displaced to a fraction of a single particle radius. The results demonstrate heterogeneous mechanical response that is location-dependent. The weak locations may be analogous to the "soft spots" previously predicted in glasses and other disordered packings.

引用

页码：2455 / 2462

页数：8

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