Nanoindentation of atomically modified surfaces

Sean G. Corcoran, Stanko R. Brankovic, Nikolay Dimitrov, Karl Sieradzki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations

Abstract

Nanoindentation studies on metal and semiconducting surfaces often display excursions in the load-displacement curves. These displacement excursions have been attributed to phase transitions, oxide breakthrough, surface contamination effects, and dislocation nucleation under the indenter tip. We have shown recently that displacement excursions were present for nanoindentation on single crystal Au (111), (110) and (100), and were attributed to dislocation nucleation since all other phenomena were ruled out. We present our recent results that have been aimed at understanding the effects of surface modification at the nanoscale on dislocation nucleation. The effects of modifying the Au surface with electrochemically deposited metal monolayers (Pb and Ag), with an electrochemically deposited oxide monolayer and an electrochemically reconstructed surface will be presented. Hardness differences as great as a factor of 3 have been observed for these surfaces. These experiments are unique in that they were carried out under electrochemical control where strict control of the surface cleanliness can be maintained.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium - Proceedings
EditorsR.L. Crane, J.D. Achenbach, S.P. Shah, T.E. Matikas, P. Khuri-Yakub, R.S. Gilmore
PublisherMRS
Pages77-84
Number of pages8
Volume505
StatePublished - 1998
Externally publishedYes
EventProceedings of the 1997 MRS Fall Meeting - Boston, MA, USA
Duration: Nov 30 1997Dec 4 1997

Other

OtherProceedings of the 1997 MRS Fall Meeting
CityBoston, MA, USA
Period11/30/9712/4/97

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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