Influence of structural depth of laser-patterned steel surfaces on the solid lubricity of carbon nanoparticle coatings  

作　　者：Timothy MACLUCAS Lukas DAUT Philipp GRÜTZMACHER Maria Agustina GUITAR Volker PRESSER Carsten GACHOT Sebastian SUAREZ Frank MÜCKLICH 

机构地区：[1]Chair of Functional Materials,Saarland University,Saarbrücken 66123,Germany [2]Institute for Engineering Design and Product Development,TU Wien,Wien 1060,Austria [3]INM–Leibniz Institute for New Materials,Saarbrücken 66123,Germany [4]Department of Materials Science&Engineering,Saarland University,Saarbrücken 66123,Germany [5]Saarene-Saarland Center for Energy Materials and Sustainability,Saarbrücken 66123,Germany

出　　处：《Friction》2023年第7期1276-1291,共16页摩擦（英文版）

基　　金：financial support by the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation)within the project MU 959/47-1;Furthermore,the authors gratefully acknowledge funding in the ZuMat project;supported by the State of Saarland from the European Regional Development Fund(Europäischer Fonds für Regionale Entwicklung,EFRE).P.Grützmacher and C.Gachot would like to thank the Government of Lower Austria(WST3)for financially supporting the endowed professorship tribology at the TU Wien.V.Presser thanks Eduard Arzt(INM)for his continuing support.

摘　　要：Carbon nanoparticle coatings on laser-patterned stainless-steel surfaces present a solid lubrication system where the pattern's recessions act as lubricant-retaining reservoirs.This study investigates the influence of the structural depth of line patterns coated with multi-walled carbon nanotubes(CNTs)and carbon onions(COs)on their respective potential to reduce friction and wear.Direct laser interference patterning(DLIP)with a pulse duration of 12 ps is used to create line patterns with three different structural depths at a periodicity of 3.5μm on AISI 304 steel platelets.Subsequently,electrophoretic deposition(EPD)is applied to form homogeneous carbon nanoparticle coatings on the patterned platelets.Tribological ball-on-disc experiments are conducted on the as-described surfaces with an alumina counter body at a load of 100 mN.The results show that the shallower the coated structure,the lower its coefficient of friction(COF),regardless of the particle type.Thereby,with a minimum of just below 0.20,CNTs reach lower COF values than COs over most of the testing period.The resulting wear tracks are characterized by scanning electron microscopy,transmission electron microscopy,and energy-dispersive X-ray spectroscopy.During friction testing,the CNTs remain in contact,and the immediate proximity,whereas the CO coating is largely removed.Regardless of structural depth,no oxidation occurs on CNT-coated surfaces,whereas minor oxidation is detected on CO-coated wear tracks.

关 键 词：solid lubricant coatings carbon nanotubes carbon onions direct laser interference patterning(DLIP)surface structuring electrophoretic deposition(EPD) 

分 类 号：TE624.82[石油与天然气工程—油气加工工程] TB383.1[一般工业技术—材料科学与工程]