In-situ investigation of lateral junction growth by nanoindentation

研究成果: Conference contribution

摘要

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.

原文English
主出版物標題5th World Tribology Congress, WTC 2013
發行者Politecnico di Torino (DIMEAS)
頁面2027-2030
頁數4
ISBN(電子)9781634393522
出版狀態Published - 2014
事件5th World Tribology Congress, WTC 2013 - Torino, Italy
持續時間: 2013 9月 82013 9月 13

出版系列

名字5th World Tribology Congress, WTC 2013
3

Other

Other5th World Tribology Congress, WTC 2013
國家/地區Italy
城市Torino
期間13-09-0813-09-13

All Science Journal Classification (ASJC) codes

  • 製程化學與技術
  • 機械工業

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