Tribological behaviour of Ti_(3)C_(2)T_(x) nano-sheets: Substrate-dependent tribo-chemical reactions  

作　　者：Alberto ROTA Nicolas BELLINA Bo WANG Andreas ROSENKRANZ 

机构地区：[1]Dipartimento di Scienze Fisiche,Informatiche e Matematiche,Universitàdi Modena e Reggio Emilia,Modena 41125,Italy [2]CNR-Istituto di Nanoscienze,Centro S3,Modena 41125,Italy [3]Centro Interdipartimentale per la Ricerca Applicata e i Servizi nel settore della Meccanica Avanzata e della Motoristica,Universitàdi Modena e Reggio Emilia,Modena 41125,Italy [4]Key Laboratory of Marine New Materials and Related Technology,Zhejiang Key Laboratory of Marine Materials and Protection Technology,Ningbo Institute of Material Technology&Engineering,Chinese Academy of Sciences,Ningbo 315201,China [5]Department of Chemical Engineering,Biotechnology and Materials,University of Chile,Santiago 8370456,Chile

出　　处：《Friction》2023年第8期1522-1533,共12页摩擦（英文版）

基　　金：A.Rosenkranz gratefully acknowledges the financial support given by ANID(Chile)in the framework of the Fondecyt projects 1220331 and EQM190057.In addition,A.Rosenkranz acknowledges the support from the University of Chile and VID in the framework of U-Moderniza UM-04/19.

摘　　要：MXenes,a newly emerging class of layered two dimensional(2D)materials,are promising solid lubricants due to their 2D structure consisting of weakly-bonded layers with a low shear strength and ability to form beneficial tribo-layers.This work aims at evaluating for the first time MXenes lubrication performance and tribofilm formation ability on different metallic substrates(mirror-lapped Fe and Cu discs).After depositing MXenes via ethanol(1 wt%)on the substrates,pronounced differences in the resulting substrate-dependent frictional evolution are observed.While MXenes are capable to reduce friction for both substrates after the full evaporation of ethanol,MXenes lubricating effect on Cu is long-lasting,with a 35-fold increased lifetime compared to Fe.Raman spectra acquired in the wear-tracks of the substrates and counter-bodies reveal notable differences in the friction-induced chemical changes depending on the substrate material.In case of Fe,the progressive failure of MXenes lubrication generates different Fe oxides on both the substrate and the ball,resulting in continuously increasing friction and a poor lubrication effect.For Cu,sliding induces the formation of a Ti_(3)C_(2)-based tribofilm on both rubbing surfaces,enabling a long-lasting lubricating effect.This work boosts further experimental and theoretical work on MXenes involved tribo-chemical processes.

关 键 词：Mxenes Ti_(3)C_(2)T_(x) nano-sheets coefficient of friction Raman spectroscopy TRIBOCHEMISTRY 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]