Journal
SCRIPTA MATERIALIA
Volume 65, Issue 5, Pages 456-459Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.06.001
Keywords
Dislocations; Aluminum; Polyimide; Thin films; In situ TEM
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Funding
- POSTECH Basic Science Research Institute [4.0006571]
- Ministry of Education, Science and Technology [2011-0005845]
- Austrian Academy of Sciences
- Austrian Science Fund (FWF) [P22440]
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Tensile straining of a cross-sectional Al/polyimide was performed in a transmission electron microscope. The tensile deformation of Al was accomplished mainly by dislocations emitted from the film surface, which glide and impinge on the Al/polyimide interface. During further straining the interfacial dislocations disappeared, indicating dislocation core spreading, whereas threading dislocations moved towards the film surface. While the Al/polyimide interface remains flat and becomes depleted of dislocations, the Al surface becomes increasingly rough accompanied by a noticeable increase in dislocation density. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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