In situ observation of stress-induced Au–Si phase transformation

Huitink, D.; Peng, L.; Ribeiro, R.; Liang, H.
May 2009
Applied Physics Letters;5/4/2009, Vol. 94 Issue 18, p183111
Academic Journal
Nonequilibrium AuSi3 was found due to indenting contact forces at a gold and silicon interface. An in situ transmission electron microscope was used to observe interactions at the material interface during nanoindentation and to identify crystal structures. Furthermore, sliding of a gold-coated atomic-force microscope probe over a silicon substrate forms organized nanostructures. An evaluation of the observed interfacial mechanisms concluded that the contact stress triggered the phase transformation leading to the formation of a metastable interface that mediates the adhesion of contacting materials.


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