Film thickness and friction behaviour of thermally aged lubricating greases

Detalhes bibliográficos
Autor(a) principal: Gonçalves, David
Data de Publicação: 2016
Outros Autores: Graça, Beatriz, Campos, Armando José Vilaça, Seabra, J.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.22/10050
Resumo: Non-additized batches of lubricating greases were subjected to an artificial thermal aging procedure. The fresh and aged samples were then tribologically characterized through film thickness measurements and Stribeck curves, over a large range of entrainment speeds on a ball-on-disc test rig at different operating temperatures, ensuring fully flooded conditions. The results were analysed at the light of the physical and chemical changes regarding the fresh greases. The film thickness increased for all greases after the thermal aging. The film thickness plateau at low speeds also changed and for certain greases it disappeared under the same range of entrainment speeds. The friction behaviour also changed considerably given the changes to the lubrication regimes for the same speeds.
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spelling Film thickness and friction behaviour of thermally aged lubricating greasesThermal agingLubricating greasesFilm thicknessFriction behaviourNon-additized batches of lubricating greases were subjected to an artificial thermal aging procedure. The fresh and aged samples were then tribologically characterized through film thickness measurements and Stribeck curves, over a large range of entrainment speeds on a ball-on-disc test rig at different operating temperatures, ensuring fully flooded conditions. The results were analysed at the light of the physical and chemical changes regarding the fresh greases. The film thickness increased for all greases after the thermal aging. The film thickness plateau at low speeds also changed and for certain greases it disappeared under the same range of entrainment speeds. The friction behaviour also changed considerably given the changes to the lubrication regimes for the same speeds.ElsevierRepositório Científico do Instituto Politécnico do PortoGonçalves, DavidGraça, BeatrizCampos, Armando José VilaçaSeabra, J.20162117-01-01T00:00:00Z2016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.22/10050eng10.1016/j.triboint.2016.01.044metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-13T12:51:31Zoai:recipp.ipp.pt:10400.22/10050Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:30:29.814854Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Film thickness and friction behaviour of thermally aged lubricating greases
title Film thickness and friction behaviour of thermally aged lubricating greases
spellingShingle Film thickness and friction behaviour of thermally aged lubricating greases
Gonçalves, David
Thermal aging
Lubricating greases
Film thickness
Friction behaviour
title_short Film thickness and friction behaviour of thermally aged lubricating greases
title_full Film thickness and friction behaviour of thermally aged lubricating greases
title_fullStr Film thickness and friction behaviour of thermally aged lubricating greases
title_full_unstemmed Film thickness and friction behaviour of thermally aged lubricating greases
title_sort Film thickness and friction behaviour of thermally aged lubricating greases
author Gonçalves, David
author_facet Gonçalves, David
Graça, Beatriz
Campos, Armando José Vilaça
Seabra, J.
author_role author
author2 Graça, Beatriz
Campos, Armando José Vilaça
Seabra, J.
author2_role author
author
author
dc.contributor.none.fl_str_mv Repositório Científico do Instituto Politécnico do Porto
dc.contributor.author.fl_str_mv Gonçalves, David
Graça, Beatriz
Campos, Armando José Vilaça
Seabra, J.
dc.subject.por.fl_str_mv Thermal aging
Lubricating greases
Film thickness
Friction behaviour
topic Thermal aging
Lubricating greases
Film thickness
Friction behaviour
description Non-additized batches of lubricating greases were subjected to an artificial thermal aging procedure. The fresh and aged samples were then tribologically characterized through film thickness measurements and Stribeck curves, over a large range of entrainment speeds on a ball-on-disc test rig at different operating temperatures, ensuring fully flooded conditions. The results were analysed at the light of the physical and chemical changes regarding the fresh greases. The film thickness increased for all greases after the thermal aging. The film thickness plateau at low speeds also changed and for certain greases it disappeared under the same range of entrainment speeds. The friction behaviour also changed considerably given the changes to the lubrication regimes for the same speeds.
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-01-01T00:00:00Z
2117-01-01T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.22/10050
url http://hdl.handle.net/10400.22/10050
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1016/j.triboint.2016.01.044
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dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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