Title: Model of the effect of local frictional heating on the tribodesorbed gases from metals in ultra-high vacuum

Authors: Roman Nevshupa, Elisa Roman, Jose Luis De Segovia

Addresses: Department of Surface Physics and Engineering, Institute of Materials Science of Madrid, C/Sor Juana Ines de la Cruz 3, 28049 Madrid, Spain. ' Department of Surface Physics and Engineering, Institute of Materials Science of Madrid, C/Sor Juana Ines de la Cruz 3, 28049 Madrid, Spain. ' Department of Surface Physics and Engineering, Institute of Materials Science of Madrid, C/Sor Juana Ines de la Cruz 3, 28049 Madrid, Spain

Abstract: In this paper, a model of thermal desorption of gases from the friction zone of metals in ultra-high vacuum is presented. Comparison of the model with the experimental data of tribodesorbed gases from AISI 304 steel shows that for mild friction the amount of desorbed gases owing to the local temperature increase is much lower than the experimentally obtained values. This finding supports the hypothesis that structural modification of material is the main driving process for tribodesorption. The study also shows that a significant volume of material around the friction zone contributes to the tribodesorption process.

Keywords: frictional heating; gas desorption; tribochemistry; metals; mild friction; high vacuum; thermal desorption; modelling; steel; tribodesorption.

DOI: 10.1504/IJMPT.2010.031895

International Journal of Materials and Product Technology, 2010 Vol.38 No.1, pp.57 - 65

Published online: 01 Mar 2010 *

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