期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2012.05.056
关键词
Crystalline/crystalline multilayers; Crystalline/amorphous multilayers; Interface; Hardness
类别
资金
- 973 Program of China [2010CB631003]
- 111 Project of China [B06025]
- National Natural Science Foundation of China [50971097]
- Fundamental Research Funds for the Central Universities
- China Scholarship Council (CSC)
- US NSF-DMR Metallic Materials and Nanostructures Program [0644835]
- NSFC [50801036]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0644835] Funding Source: National Science Foundation
We compare the indentation hardness of crystal/crystal (C/C) Cu/Zr multilayers and the crystal/amorphous (C/A) Cu/Cu-Zr multilayers with equal individual layer thicknesses spanning from 1 to 200 nm. Both systems show similar layer thickness dependent evolution of hardness. At smaller layer thickness the C/C multilayers show softening, while no softening is observed in the C/A multilayers. The layer thickness dependent hardness is quantitatively estimated by using dislocation models. The significance of crystalline (Zr) layer and amorphous (Cu-Zr) layer on plastic deformation mechanisms is discussed. (c) 2012 Elsevier B.V. All rights reserved.
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