A combined experimental and theoretical study on the mechanisms behind tribocharging phenomenon and the influence of triboemission

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Title: A combined experimental and theoretical study on the mechanisms behind tribocharging phenomenon and the influence of triboemission
Authors: Ciniero, A
Fatti, G
Righi, MC
Dini, D
Reddyhoff, T
Item Type: Journal Article
Abstract: This work describes recent research into the mechanisms behind tribocharging and the influence of triboemission. The term tribocharging is a type of contact-induced electrification and refers to the transfer of charge between rubbing components. The term triboemission, on the other hand, refers to emission of electrons, ions and photons generated when surfaces are rubbed together. The understanding of tribocharging is of wide interest for several industrial applications and in particular the combination of tribocharging and triboemission may be important in lubricated contacts in the formation of boundary lubricant films. We report the use of a unique vacuum measurement system that enables to measure surface charge variations while simultaneously recording triboemission events during the sliding of a diamond tip on silica specimens. Results show for the first time that tribocharging and triboemission behavior are linked and depend on the surface wear. The contribution of contact-induced electrification to the charging of the surface is then described by means of density functional theory (DFT). Results give insight into the transfer of charge from the SiO2 amorphous surface (silica) to the C(111) surface (diamond ) and into the variation of charging during simulated sliding contact.
Issue Date: 15-Dec-2019
Date of Acceptance: 12-Sep-2019
URI: http://hdl.handle.net/10044/1/75802
DOI: 10.2474/trol.14.367
ISSN: 1881-218X
Publisher: Japanese Society of Tribologists
Start Page: 367
End Page: 374
Journal / Book Title: Tribology Online
Volume: 14
Issue: 5
Copyright Statement: © 2019 Japanese Society of Tribologists. This article is distributed under the terms of the latest version of CC BY-NC-ND defined by the Creative Commons Attribution License.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/N025954/1
Publication Status: Published
Open Access location: https://www.jstage.jst.go.jp/article/trol/14/5/14_367/_article/-char/ja/
Online Publication Date: 2019-12-15
Appears in Collections:Mechanical Engineering
Faculty of Natural Sciences

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