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Influence of femtosecond laser surface nanotexturing on the friction behavior of silicon sliding against PTFE

2019-09Journal article Open access
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dc.contributor.authorAlves-Lopes, Isabel
dc.contributor.authorAlmeida, Amélia
dc.contributor.authorOliveira, Vítor
dc.contributor.authorVilar, Rui
dc.date.accessioned2020-04-17T19:37:16Z
dc.date.available2020-04-17T19:37:16Z
dc.date.issued2019-09
dc.description.abstractThe aim of the present work was to investigate the influence of laser-induced periodic surface structures (LIPSS) produced by femtosecond laser on the friction behavior of silicon sliding on polytetrafluoroethylene (PTFE) in unlubricated conditions. Tribological tests were performed on polished and textured samples in air using a ball-on-flat nanotribometer, in order to evaluate the friction coefficient of polished and textured silicon samples, parallel and perpendicularly to the LIPSS orientation. In the polished specimens, the friction coefficient decreases with testing time at 5 mN, while it increases slightly at 25 mN. It also decreases with increasing applied load. For the textured specimens, the friction coefficient tends to decrease with testing time in both sliding directions studied. In the parallel sliding direction, the friction coefficient decreases with increasing load, attaining values similar to those measured for the polished specimen, while it is independent of the applied load in the perpendicular sliding direction, exhibiting values lower than in the two other cases. These results can be explained by variations in the main contributions to friction and in the wear mechanisms. The influence of the temperature increase at the interface and the consequent changes in the crystalline phases of PTFE are also considered.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationALVES-LOPES, Isabel; [et al] – Influence of femtosecond laser surface nanotexturing on the friction behavior of silicon sliding against PTFE. Nanomaterials. ISSN 2079-4991. Vol. 9, N.º 9 (2019), pp. 1-22pt_PT
dc.identifier.doi10.3390/nano9091237pt_PT
dc.identifier.issn2079-4991
dc.identifier.urihttp://hdl.handle.net/10400.21/11478
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationPD/BD/143034/2018 - FCTpt_PT
dc.subjectLaser surface texturingpt_PT
dc.subjectLaser-induced periodic surface structurespt_PT
dc.subjectLIPSSpt_PT
dc.subjectSiliconpt_PT
dc.subjectPTFEpt_PT
dc.subjectFrictionpt_PT
dc.titleInfluence of femtosecond laser surface nanotexturing on the friction behavior of silicon sliding against PTFEpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FCTM%2F04540%2F2013/PT
oaire.citation.endPage22pt_PT
oaire.citation.issue9pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleNanomaterialspt_PT
oaire.citation.volume9pt_PT
oaire.fundingStream5876
person.familyNameAlmeida
person.familyNameOliveira
person.familyNameVilar
person.givenNameAmelia
person.givenNameVitor
person.givenNameRui
person.identifier.ciencia-id0910-636F-E139
person.identifier.ciencia-idDA1C-25BD-5974
person.identifier.orcid0000-0002-4092-1029
person.identifier.orcid0000-0002-1757-4524
person.identifier.orcid0000-0003-1167-6164
person.identifier.ridB-5649-2008
person.identifier.ridA-3058-2009
person.identifier.scopus-author-id7202913198
person.identifier.scopus-author-id7006105706
person.identifier.scopus-author-id7007023936
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationaa238e8a-a0a1-4f49-be44-3ae9efcd47b8
relation.isAuthorOfPublication269ff9af-427f-4d1d-949c-cd77cd386e9f
relation.isAuthorOfPublicationdf62a3b3-a187-4c5a-b313-e27593495205
relation.isAuthorOfPublication.latestForDiscovery269ff9af-427f-4d1d-949c-cd77cd386e9f
relation.isProjectOfPublication3297f951-302f-4f9a-a77a-f5068533d370
relation.isProjectOfPublication.latestForDiscovery3297f951-302f-4f9a-a77a-f5068533d370

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