Strain gradients and the strength of nanoporous gold

被引：12
|
作者：
Dou, Rui [1 ]
Derby, Brian [1 ]
机构：
[1] Univ Manchester, Sch Mat, Manchester M1 7HS, Lancs, England
来源：
JOURNAL OF MATERIALS RESEARCH | 2010年 / 25卷 / 04期
关键词：
MECHANICAL-PROPERTIES; PLASTICITY; DEFORMATION; PILLARS;
D O I：
10.1557/JMR.2010.0099
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The very high strengths that have been reported for nanoporous gold may be related to strain gradients within the deforming porous microstructure. We present a mechanism-based model for the strength of nanoporous foams that is derived from conventional models for the deformation of macroscopic foams and now includes the influence of strain gradients. This model predicts that the strength of the ligaments within the nanoporous gold is proportional to the ligament diameter raised to the power -0.5. We have used the model to analyze experimental data for the strength of nanoporous gold and find excellent agreement with published data.
引用
收藏
页码：746 / 753
页数：8
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