Imaging the deformation-induced accumulation of defects in nanoporous gold

Maowen Liu; Jörg Weissmüller

doi:10.1080/21663831.2021.1924305

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Imaging the deformation-induced accumulation of defects in nanoporous gold

Original Report | 更新时间：2026-08-19

- Imaging the deformation-induced accumulation of defects in nanoporous gold
- Imaging the deformation-induced accumulation of defects in nanoporous gold
- 材料研究快报（英文） 2021年9卷第9期页码：359-365
- 作者机构：
  
  Institute of Materials Physics and Technology Hamburg University of Technology
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2021.1924305
  中图分类号：
- 网络首发：2021-05-17，
  
  纸质出版：2021
- 稿件说明：
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Maowen Liu, Jörg Weissmüller. Imaging the deformation-induced accumulation of defects in nanoporous gold[J]. 材料研究快报（英文）, 2021,9(9):359-365.

Maowen Liu, Jörg Weissmüller. Imaging the deformation-induced accumulation of defects in nanoporous gold[J]. Materials Research Letters, 2021, 9(9): 359-365.
Maowen Liu, Jörg Weissmüller. Imaging the deformation-induced accumulation of defects in nanoporous gold[J]. 材料研究快报（英文）, 2021,9(9):359-365. DOI： 10.1080/21663831.2021.1924305.

Maowen Liu, Jörg Weissmüller. Imaging the deformation-induced accumulation of defects in nanoporous gold[J]. Materials Research Letters, 2021, 9(9): 359-365. DOI： 10.1080/21663831.2021.1924305.

摘要

Abstract

Nanoporous gold (NPG) provides a model material for studying small-scale deformation and the mechanical behavior of network solids. We report a transmission electron microscopy study of the defect structure in electron-transparent NPG leaf deformed by rolling. The results confirm that plastic deformation significantly enhances the defect density. Specifically

twins are formed on several sets of crystallographic planes

and their interaction forms Lomer-Cottrell locks. This inhibits dislocation escaping from NPG

thus avoiding the dislocation starvation scenario that is often considered in the ‘smaller is stronger' context of small-scale plasticity. Instead

strain hardening is apparently linked to accumulation and interaction of twins.

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相关机构

Department of Materials Science and Engineering Zhejiang University

College of Electrical Engineering Zhejiang University

Department of Materials Science and Engineering China Jiliang University

Department of Materials Science and Engineering Zhejiang University Hangzhou People's Republic of China

Department of Materials Science and Engineering Pohang University of Science and Technology

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