Publicação
Grain size effect on self-mated CVD diamond dry tribosystems
| Resumo: | Chemical vapour deposited (CVD) diamond coatings are important for tribological applications due to their unique combination of properties. Previous work demonstrated that silicon nitride (Si3N4) excels as a substrate for diamond coatings due to its low thermal expansion coefficient mismatch relative to diamond films resulting in a significant adhesion improvement. In this study, dense Si3N4 substrates were fabricated by pressureless sintering and diamond coated by microwave plasma chemical vapour deposition (MPCVD). The deposition time varied between 1 and 10 hours in order to investigate the effect of the diamond grain size and film thickness on the tribological behaviour of self-mated CVD diamond coatings on Si3N4. Reciprocating dry sliding ball-on-flat wear tests were performed in air up to 16 hours, at room temperature, with normal applied load ranging from 10 N to 105 N. The stroke and frequency of the sliding motion were kept constant with values of 6 mm and 1 Hz, respectively. Several characterisation techniques (SEM, AFM, micro-Raman) were used to identify the prevailing surface damage mechanisms. After a very short running-in regime, with high friction coefficients, a steady-state regime is reached, characterized by extremely low friction values (f~0.03). A mild wear mode was achieved for the longer runs, with wear coefficient values around 10-8 mm3N-1m-1. The larger grain sized and thicker coatings present smaller compressive residual stresses (below 1 GPa) due to a better in-depth accommodation of the contact pressure. This delays film delamination to much higher applied loads (105 N) than the thinner, small grain sized coatings, grown for 1 hour that fail in sliding under 35 N of normal load. |
|---|---|
| Autores principais: | Abreu, C. S. |
| Outros Autores: | Oliveira, F. J.; Belmonte, M.; Fernandes, A. J. S.; Silva, R. F.; Gomes, J. R. |
| Assunto: | Wear Friction CVD diamond Grain size |
| Ano: | 2005 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| _version_ | 1866269894698336256 |
|---|---|
| author | Abreu, C. S. |
| author2 | Oliveira, F. J. Belmonte, M. Fernandes, A. J. S. Silva, R. F. Gomes, J. R. |
| author2_role | author author author author author |
| author_facet | Abreu, C. S. Oliveira, F. J. Belmonte, M. Fernandes, A. J. S. Silva, R. F. Gomes, J. R. |
| author_role | author |
| contributor_name_str_mv | Universidade do Minho |
| country_str | PT |
| creators_json_txt | [{\"Person.name\":\"Abreu, C. S.\"},{\"Person.name\":\"Oliveira, F. J.\"},{\"Person.name\":\"Belmonte, M.\"},{\"Person.name\":\"Fernandes, A. J. S.\"},{\"Person.name\":\"Silva, R. F.\"},{\"Person.name\":\"Gomes, J. R.\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Universidade do Minho |
| datacite.creators.creator.creatorName.fl_str_mv | Abreu, C. S. Oliveira, F. J. Belmonte, M. Fernandes, A. J. S. Silva, R. F. Gomes, J. R. |
| datacite.date.Accepted.fl_str_mv | 2005-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2007-02-08T11:28:40Z |
| datacite.date.embargoed.fl_str_mv | 2007-02-08T11:28:40Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| datacite.subjects.subject.fl_str_mv | Wear Friction CVD diamond Grain size |
| datacite.titles.title.fl_str_mv | Grain size effect on self-mated CVD diamond dry tribosystems |
| dc.contributor.none.fl_str_mv | Universidade do Minho |
| dc.creator.none.fl_str_mv | Abreu, C. S. Oliveira, F. J. Belmonte, M. Fernandes, A. J. S. Silva, R. F. Gomes, J. R. |
| dc.date.Accepted.fl_str_mv | 2005-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2007-02-08T11:28:40Z |
| dc.date.embargoed.fl_str_mv | 2007-02-08T11:28:40Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | https://hdl.handle.net/1822/6128 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | Elsevier |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_abf2 |
| dc.subject.none.fl_str_mv | Wear Friction CVD diamond Grain size |
| dc.title.fl_str_mv | Grain size effect on self-mated CVD diamond dry tribosystems |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_6501 |
| description | Chemical vapour deposited (CVD) diamond coatings are important for tribological applications due to their unique combination of properties. Previous work demonstrated that silicon nitride (Si3N4) excels as a substrate for diamond coatings due to its low thermal expansion coefficient mismatch relative to diamond films resulting in a significant adhesion improvement. In this study, dense Si3N4 substrates were fabricated by pressureless sintering and diamond coated by microwave plasma chemical vapour deposition (MPCVD). The deposition time varied between 1 and 10 hours in order to investigate the effect of the diamond grain size and film thickness on the tribological behaviour of self-mated CVD diamond coatings on Si3N4. Reciprocating dry sliding ball-on-flat wear tests were performed in air up to 16 hours, at room temperature, with normal applied load ranging from 10 N to 105 N. The stroke and frequency of the sliding motion were kept constant with values of 6 mm and 1 Hz, respectively. Several characterisation techniques (SEM, AFM, micro-Raman) were used to identify the prevailing surface damage mechanisms. After a very short running-in regime, with high friction coefficients, a steady-state regime is reached, characterized by extremely low friction values (f~0.03). A mild wear mode was achieved for the longer runs, with wear coefficient values around 10-8 mm3N-1m-1. The larger grain sized and thicker coatings present smaller compressive residual stresses (below 1 GPa) due to a better in-depth accommodation of the contact pressure. This delays film delamination to much higher applied loads (105 N) than the thinner, small grain sized coatings, grown for 1 hour that fail in sliding under 35 N of normal load. |
| dirty | 0 |
| eu_rights_str_mv | openAccess |
| format | article |
| fulltext.url.fl_str_mv | https://prod-dspace.uminho.pt/bitstreams/fd477049-3949-4234-abb5-bfdb721ae4fb/download |
| id | rum_6ec6545287ebcccda8a8fa24bc96fd1b |
| identifier.url.fl_str_mv | https://hdl.handle.net/1822/6128 |
| instacron_str | repositorium |
| institution | Universidade do Minho |
| instname_str | Universidade do Minho |
| language | eng |
| network_acronym_str | rum |
| network_name_str | RepositóriUM - Universidade do Minho |
| oai_identifier_str | oai:repositorium.uminho.pt:1822/6128 |
| organization_str_mv | urn:organizationAcronym:repositorium |
| person_str_mv | Abreu, C. S. Oliveira, F. J. Belmonte, M. Fernandes, A. J. S. Silva, R. F. Gomes, J. R. |
| publishDate | 2005 |
| publisher.none.fl_str_mv | Elsevier |
| reponame_str | RepositóriUM - Universidade do Minho |
| repository_id_str | urn:repositoryAcronym:rum |
| service_str_mv | urn:repositoryAcronym:rum |
| spelling | engElsevierengChemical vapour deposited (CVD) diamond coatings are important for tribological applications due to their unique combination of properties. Previous work demonstrated that silicon nitride (Si3N4) excels as a substrate for diamond coatings due to its low thermal expansion coefficient mismatch relative to diamond films resulting in a significant adhesion improvement. In this study, dense Si3N4 substrates were fabricated by pressureless sintering and diamond coated by microwave plasma chemical vapour deposition (MPCVD). The deposition time varied between 1 and 10 hours in order to investigate the effect of the diamond grain size and film thickness on the tribological behaviour of self-mated CVD diamond coatings on Si3N4. Reciprocating dry sliding ball-on-flat wear tests were performed in air up to 16 hours, at room temperature, with normal applied load ranging from 10 N to 105 N. The stroke and frequency of the sliding motion were kept constant with values of 6 mm and 1 Hz, respectively. Several characterisation techniques (SEM, AFM, micro-Raman) were used to identify the prevailing surface damage mechanisms. After a very short running-in regime, with high friction coefficients, a steady-state regime is reached, characterized by extremely low friction values (f~0.03). A mild wear mode was achieved for the longer runs, with wear coefficient values around 10-8 mm3N-1m-1. The larger grain sized and thicker coatings present smaller compressive residual stresses (below 1 GPa) due to a better in-depth accommodation of the contact pressure. This delays film delamination to much higher applied loads (105 N) than the thinner, small grain sized coatings, grown for 1 hour that fail in sliding under 35 N of normal load.application/pdfengGrain size effect on self-mated CVD diamond dry tribosystemsAbreu, C. S.Oliveira, F. J.Belmonte, M.Fernandes, A. J. S.Silva, R. F.Gomes, J. R.HostingInstitutionOrganizationalUniversidade do Minhoe-mailmailto:repositorium@usdb.uminho.ptrepositorium@usdb.uminho.ptISSNIsPartOf0043-1648DOIIsPartOf10.1016/j.wear.2005.01.0042007-02-08T11:28:40Z20052005-01-01T00:00:00ZHandlehttps://hdl.handle.net/1822/6128http://purl.org/coar/access_right/c_abf2open accessWearFrictionCVD diamondGrain size531390 bytesliteraturehttp://purl.org/coar/resource_type/c_6501journal articlehttp://purl.org/coar/access_right/c_abf2application/pdffulltexthttps://prod-dspace.uminho.pt/bitstreams/fd477049-3949-4234-abb5-bfdb721ae4fb/download |
| spellingShingle | Grain size effect on self-mated CVD diamond dry tribosystems Abreu, C. S. Wear Friction CVD diamond Grain size |
| status | SINGLETON |
| subject.fl_str_mv | Wear Friction CVD diamond Grain size |
| title | Grain size effect on self-mated CVD diamond dry tribosystems |
| title_full | Grain size effect on self-mated CVD diamond dry tribosystems |
| title_fullStr | Grain size effect on self-mated CVD diamond dry tribosystems |
| title_full_unstemmed | Grain size effect on self-mated CVD diamond dry tribosystems |
| title_short | Grain size effect on self-mated CVD diamond dry tribosystems |
| title_sort | Grain size effect on self-mated CVD diamond dry tribosystems |
| topic | Wear Friction CVD diamond Grain size |
| topic_facet | Wear Friction CVD diamond Grain size |
| url | https://hdl.handle.net/1822/6128 |
| visible | 1 |