Nanoindentation in situ a Transmission Electron Microscope
Independent thesis Basic level (professional degree), 20 credits / 30 HE creditsStudent thesis
The technique of Nanoindentation in situ Transmission Electron Microscope has been implemented on a Philips CM20. Indentations have been performed on Si and Sapphire (α-Al2O3) cut from wafers; Cr/Sc multilayers and Ti3SiC2 thin films. Different sample geometries and preparation methods have been evaluated. Both conventional ion and Focused Ion Beam milling were used, with different ways of protecting the sample during milling. Observations were made of bending and fracture of samples, dislocation nucleation and dislocation movement. Basal slip was observed upon unloading in Sapphire. Dislocation movement constricted along the basal planes were observed in Ti3SiC2. Post indentation electron microscopy revealed kink formation in Ti3SiC2 and layer rotation and slip across layers in Cr/Sc multilayer stacks. Limitations of the technique are presented and discussed.
Place, publisher, year, edition, pages
Institutionen för fysik, kemi och biologi , 2007. , 40 p.
nanoindentation, electron microscopy, mechanincal deformation, thin films, MAX phases, functional ceramics
Other Engineering and Technologies
IdentifiersURN: urn:nbn:se:liu:diva-8333ISRN: LITH-IFM-EX--07/1732--SEOAI: oai:DiVA.org:liu-8333DiVA: diva2:23157
2007-03-07, Planck, Fysikhuset, Campus Valla, Linköpings Universitet, Linköping, 10:15