The Size Dependent Deformation and Strengthening Mechanisms of Nanolayered Co/Ag Micropillars

Using the micropillar compression technique, the size effect on deformation and strengthening mechanisms of the Co/Ag micropillars with an individual thickness ranging from 2 to 100 nm were investigated. The results show that the deformation mechanism of Co/Ag micropillars is intrinsically size depe...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2019-12, Vol.50 (12), p.5640-5649
Main Authors: Zhao, Cancan, Xin, Renlong, Ren, Fuzeng
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Cobalt
Deformation effects
Deformation mechanisms
Dislocations
Extrusion
Materials Science
Metallic Materials
Nanotechnology
Shear localization
Silver
Size effects
Structural Materials
Surfaces and Interfaces
Thickness
Thin Films
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Summary:Using the micropillar compression technique, the size effect on deformation and strengthening mechanisms of the Co/Ag micropillars with an individual thickness ranging from 2 to 100 nm were investigated. The results show that the deformation mechanism of Co/Ag micropillars is intrinsically size dependent, evolving from extrusion of the Ag layer for individual layer thickness h i  = 100 nm to pure shear localization for h i  ≤ 10 nm. Meanwhile, the dominant strengthening mechanism transforms from Hall–Petch scaling to confined layer slip and then to interface crossing of single dislocation with the decreasing h i .
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-019-05464-x