Effect of Substrate Shape on Friction Regimes and on Tip Jump Probability in Atomic Scale Friction-Reference-Cited by-同舟云学术

Effect of Substrate Shape on Friction Regimes and on Tip Jump Probability in Atomic Scale Friction

Published:2017-12-20 Issue:3 Volume:140 Page:
ISSN:0742-4787
Container-title:Journal of Tribology
language:en
Short-container-title:

Author:

Djiha Tchaptchet E.¹,Djuidje Kenmoe G.²,Kofane T. C.²

Affiliation:

1. Laboratory of Mechanics, Department of Physics, Faculty of Science, University of Yaoundé 1, P.O. Box 812, Yaoundé 337, Cameroon e-mail:

2. Laboratory of Mechanics, Department of Physics, Faculty of Science, University of Yaoundé 1, P.O. Box 812, Yaoundé 337, Cameroon; Centre d'Excellence en Technologies de l'Information et de la Communication (CETIC), University of Yaoundé 1, Yaoundé 337, Cameroon e-mail:

Abstract

We investigate the effect of the shape potential on the frictional behavior transitions. The Tomlinson parameter for the deformable substrate potential is calculated theoretically and its influence on friction force is studied. Futhermore, effects of temperature and substrate shape on the tip jump probability are presented. We find two critical times, which characterize the tip dynamics. The first critical time is the time spent by the tip to reach next potential minimum and the second is the time at which the tip exhibits an equiprobability of forward and backward jump. We show that these critical times depend strongly on the substrate shape as well as on the temperature.

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Link

http://asmedigitalcollection.asme.org/tribology/article-pdf/doi/10.1115/1.4038409/6291901/trib_140_03_031606.pdf

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