Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis.

Bibliographic Details
Main Author: Hyla, Edona
Publication Date: 2019
Format: Master thesis
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: https://hdl.handle.net/10316/93611
Summary: Dissertação de Mestrado Conjunto Europeu em Tribologia de Superficies e Interfaces apresentada à Faculdade de Ciências e Tecnologia
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spelling Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis.Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis.TribologyWearFrictionLubricationDLCTribologyWearFrictionLubricationDLCDissertação de Mestrado Conjunto Europeu em Tribologia de Superficies e Interfaces apresentada à Faculdade de Ciências e TecnologiaThis project is motivated from now days trends in the automotive industry to increase fuel efficiency and fulfill environmental standards. To do so the increase of soot (carbon black particles) in the Internal Combustion Engines has become a big issue, challenging the environmental impact of disposing oil and overall maintenance cost of running a vehicle. Diamond Like Carbon (DLC) thin films are widely used for protection of components under high load from wear and/to reduce friction loses in combustion engines. To furthermore increase the properties of DLC, using Magnetron Sputtering (DCMS), standard steel balls for the 4 Ball Tester were coated with DLC doped with tungsten (W-DLC) and DLC doped with silver (Ag-DLC). In basic, the interaction among soot/W-DLC coated steel surfaces and soot/Ag-DLC coated steel surfaces as a possible solution to the soot wear problems and further development of soot wear resistant lubricants has been investigated. Before the test, the type of contact of the tribopair has been studied. Friction and wear properties of W-DLC and Ag-DLC have been tested in boundary lubrication conditions using a 4 Ball Test. To check the coating efficacity and its interaction with the base oil(Ester Base Oil), additive (Glycerol Monooleate) and soot (Carbon Black), Optical Microscope for wear scar images, 3D Profilometry to obtain the 3D profile of the wear scar and Raman Spectroscopy to check on the coating structure have been applied. Test results showed the benefit of the W-DLC/Steel and Ag-DLC/Steel contact over the Steel/Steel contact.This project is motivated from now days trends in the automotive industry to increase fuel efficiency and fulfill environmental standards. To do so the increase of soot (carbon black particles) in the Internal Combustion Engines has become a big issue, challenging the environmental impact of disposing oil and overall maintenance cost of running a vehicle. Diamond Like Carbon (DLC) thin films are widely used for protection of components under high load from wear and/to reduce friction loses in combustion engines. To furthermore increase the properties of DLC, using Magnetron Sputtering (DCMS), standard steel balls for the 4 Ball Tester were coated with DLC doped with tungsten (W-DLC) and DLC doped with silver (Ag-DLC). In basic, the interaction among soot/W-DLC coated steel surfaces and soot/Ag-DLC coated steel surfaces as a possible solution to the soot wear problems and further development of soot wear resistant lubricants has been investigated. Before the test, the type of contact of the tribopair has been studied. Friction and wear properties of W-DLC and Ag-DLC have been tested in boundary lubrication conditions using a 4 Ball Test. To check the coating efficacity and its interaction with the base oil(Ester Base Oil), additive (Glycerol Monooleate) and soot (Carbon Black), Optical Microscope for wear scar images, 3D Profilometry to obtain the 3D profile of the wear scar and Raman Spectroscopy to check on the coating structure have been applied. Test results showed the benefit of the W-DLC/Steel and Ag-DLC/Steel contact over the Steel/Steel contact.2019-07-24info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesishttps://hdl.handle.net/10316/93611https://hdl.handle.net/10316/93611TID:202307719engHyla, Edonainfo:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2022-05-25T10:03:33Zoai:estudogeral.uc.pt:10316/93611Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-29T05:41:19.635621Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis.
Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis.
title Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis.
spellingShingle Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis.
Hyla, Edona
Tribology
Wear
Friction
Lubrication
DLC
Tribology
Wear
Friction
Lubrication
DLC
title_short Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis.
title_full Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis.
title_fullStr Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis.
title_full_unstemmed Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis.
title_sort Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis.
author Hyla, Edona
author_facet Hyla, Edona
author_role author
dc.contributor.author.fl_str_mv Hyla, Edona
dc.subject.por.fl_str_mv Tribology
Wear
Friction
Lubrication
DLC
Tribology
Wear
Friction
Lubrication
DLC
topic Tribology
Wear
Friction
Lubrication
DLC
Tribology
Wear
Friction
Lubrication
DLC
description Dissertação de Mestrado Conjunto Europeu em Tribologia de Superficies e Interfaces apresentada à Faculdade de Ciências e Tecnologia
publishDate 2019
dc.date.none.fl_str_mv 2019-07-24
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://hdl.handle.net/10316/93611
https://hdl.handle.net/10316/93611
TID:202307719
url https://hdl.handle.net/10316/93611
identifier_str_mv TID:202307719
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
_version_ 1833602439118323712

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