In-situ TEM straining experiments of Al films on polyimide using a novel FIB design for specimen preparation
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In-situ transmission electron microscopy (TEM) straining experiments are tedious to perform but give invaluable insight into the deformation processes of materials. With the current interest in mechanical size-effects of nanocrystalline materials and thin metallic films, in-situ tensile testing in the TEM is the key method for identifying underlying deformation mechanisms. In-situ TEM experiments can be significantly simplified using well-designed specimens. The advantages of a novel focussed ion beam design and first in-situ straining results of 500-nm thick single-crystalline Al films on polyimide are reported and compared to conventionally prepared Al films on polyimide.
KeywordsPolyimide Transmission Electron Microscopy Sample Interfacial Dislocation Conventional Transmission Electron Microscopy Tensile Testing Sample
GD thanks Dr. T. Wagner and his team from the Max-Planck-Institut für Metallforschung, Stuttgart, for growth of the Al films on NaCl substrates and P. Gruber from the Department Metallkunde, University of Stuttgart, for deposition of the polyimide coating. The experiments were mainly performed, while GD was working at the Max-Planck-Institut für Metallforschung in Stuttgart. Dr. Sang Ho Oh is thanked for recording the image presented in Fig. 4. Support by Prof. E. Arzt for this research project is gratefully acknowledged.
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