Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/93611
DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Carvalho, Albano Augusto Cavaleiro Rodrigues de | - |
dc.contributor.advisor | Veeregowda, Deepak H | - |
dc.contributor.author | Hyla, Edona | - |
dc.date.accessioned | 2021-03-17T23:12:29Z | - |
dc.date.available | 2021-03-17T23:12:29Z | - |
dc.date.issued | 2019-07-24 | - |
dc.date.submitted | 2021-03-17 | - |
dc.identifier.uri | https://hdl.handle.net/10316/93611 | - |
dc.description | Dissertação de Mestrado Conjunto Europeu em Tribologia de Superficies e Interfaces apresentada à Faculdade de Ciências e Tecnologia | - |
dc.description.abstract | 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. | por |
dc.description.abstract | 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. | eng |
dc.language.iso | eng | - |
dc.rights | openAccess | - |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | - |
dc.subject | Tribology | por |
dc.subject | Wear | por |
dc.subject | Friction | por |
dc.subject | Lubrication | por |
dc.subject | DLC | por |
dc.subject | Tribology | eng |
dc.subject | Wear | eng |
dc.subject | Friction | eng |
dc.subject | Lubrication | eng |
dc.subject | DLC | eng |
dc.title | Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis. | eng |
dc.title.alternative | Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis. | por |
dc.type | masterThesis | - |
degois.publication.location | Departamento de Engenharia Mecânica | - |
degois.publication.title | Influence of soot on tribological performance of uncoated and DLC-coated lubricated contacts. Friction and wear analysis. | eng |
dc.peerreviewed | yes | - |
dc.identifier.tid | 202307719 | - |
thesis.degree.discipline | Tribologia | - |
thesis.degree.grantor | Universidade de Coimbra | - |
thesis.degree.level | 1 | - |
thesis.degree.name | Mestrado Conjunto Europeu em Tribologia de Superficies e Interfaces | - |
uc.degree.grantorUnit | Faculdade de Ciências e Tecnologia - Departamento de Engenharia Mecânica | - |
uc.degree.grantorID | 0500 | - |
uc.contributor.author | Hyla, Edona::0000-0002-7512-2091 | - |
uc.degree.classification | 16 | - |
uc.degree.presidentejuri | Trindade, Bruno Miguel Quelhas de Sacadura Cabral | - |
uc.degree.elementojuri | Carvalho, Albano Augusto Cavaleiro Rodrigues de | - |
uc.degree.elementojuri | Dias, João Paulo Ferreira Saraiva da Mouta | - |
uc.contributor.advisor | Carvalho, Albano Augusto Cavaleiro Rodrigues de | - |
uc.contributor.advisor | Veeregowda, Deepak H | - |
item.fulltext | Com Texto completo | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.openairetype | masterThesis | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
crisitem.advisor.dept | Faculty of Sciences and Technology | - |
crisitem.advisor.parentdept | University of Coimbra | - |
crisitem.advisor.researchunit | CEMMPRE - Centre for Mechanical Engineering, Materials and Processes | - |
crisitem.advisor.orcid | 0000-0001-8251-5099 | - |
Appears in Collections: | UC - Dissertações de Mestrado |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Edona Hyla Master Thesis.pdf | 3.06 MB | Adobe PDF | View/Open |
Google ScholarTM
Check
This item is licensed under a Creative Commons License