In-situ investigation of lateral junction growth by nanoindentation

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


The knowledge to the increase of contact area prior to gross sliding is a pivotal issue to advance the contact mechanics and nanotribology. This study performed an in-situ observation of lateral junction growth at the nanoscale, for the first time, by nanoindentation equipped in a transmission electron microscopy. The nanoasperity was prepared by focused iron beam of copper coated substrate. From the results of nanoasperity with single crystalline, it was found that the lateral junction growth is presented only when the contact interference exceeded a threshold value, which the full-stick condition was achieved. The observed directions of slips of atoms, slip plane, and movement of the dislocations inside the compressed single crystal copper nanoasperity consisted with the theoretical predictions with applied normal and lateral force. An atomistic simulation with three dimensional flat-on-asperity contact model was performed to provide the experimental results a theoretical interpretation. The experimental results were compared well with simulation results which provided constructive insights into the lateral junction growth phenomena for theoretical prediction. Our experimental and simulation results uncovered the atomic origins of the lateral junction growth at the nanoscale.

Original languageEnglish
Title of host publication5th World Tribology Congress, WTC 2013
PublisherPolitecnico di Torino (DIMEAS)
Number of pages4
ISBN (Electronic)9781634393522
Publication statusPublished - 2014 Jan 1
Event5th World Tribology Congress, WTC 2013 - Torino, Italy
Duration: 2013 Sep 82013 Sep 13

Publication series

Name5th World Tribology Congress, WTC 2013


Other5th World Tribology Congress, WTC 2013

All Science Journal Classification (ASJC) codes

  • Process Chemistry and Technology
  • Mechanical Engineering


Dive into the research topics of 'In-situ investigation of lateral junction growth by nanoindentation'. Together they form a unique fingerprint.

Cite this