Friction-Induced Chemical and Structural Modifications of Molybdenum Disulphide Thin Films

被引:0
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作者
E. Serpini
T. Vitu
A. Rota
T. Polcar
S. Valeri
机构
[1] Università di Modena e Reggio Emilia,Dipartimento di Scienze Fisiche, Informatiche e Matematiche
[2] Czech Technical University,Faculty of Electrical Engineering
[3] Università di Modena e Reggio Emilia,Centro Interdipartimentale per la Ricerca Applicata e i Servizi nella Meccanica Avanzata e nella Motoristica Intermech
关键词
molybdenum disulfide; Raman spectroscopy; sputtering; tribofilm;
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摘要
The present work investigates chemical and structural modifications of molybdenum disulphide thin coatings induced by macroscale friction in both reactive (air) and inert conditions. Chemical and micro-structural modifications were analyzed in detail by Raman spectroscopy. We found no traces of oxide formation even when sliding was performed in the air. However, the formation of a well-adhered tribofilm, related to superior lubricating properties, was detected only in inert conditions. We can conclude that, in ambient condition, it is water physisorption and not oxidation, which impairs good lubrication. At the same time, Raman spectra indicated a re-crystallization effect induced by sliding.
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页码:4117 / 4125
页数:8
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