Article ID Journal Published Year Pages File Type
1870913 Physics Procedia 2010 6 Pages PDF
Abstract
By means of an ultrafast opto-acoustic technique we study the nanoindentation of thin chromium films on sapphire substrates by a ceramic ball bearing. Acoustic echoes at ∼40 GHz returning from the film-indenter interface allow the film indentation profiles to be probed to sub-nanometer resolution over contact areas ∼25 μm in radius. The deformation of the films during loading is thereby revealed. Furthermore, thermal wave imaging of the contact at megahertz frequencies is simultaneously achieved.
Related Topics
Physical Sciences and Engineering Physics and Astronomy Physics and Astronomy (General)
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