Tribological behaviour of Si3N4–BN ceramic materials for dry sliding applications
Autor(a) principal: | |
---|---|
Data de Publicação: | 2002 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/1561 |
Resumo: | The main objective of this paper is to help on the clarification of the lack of consensus in the bibliographic data concerning the tribological behaviour of Si3N4–BN omposites. Unlubricated sliding tests by pin-on-disc were carried out with three grades of composite materials with 10, 18 and 25 vol.% of BN. The addition of BN to the Si3N4 matrix resulted in a slight reduction of the friction coefficient, which decreased from 0.82 for monolithic Si3N4 to 0.67 for Si3N4–10%BN materials. Wear coefficients (K) were above 10−5 mm3 N−1 m−1 for all materials tested and increased sharply with increases in BN volume fraction greater than 10%, e.g. K ∼ 10−3 mm3 N−1 m−1 for Si3N4–25%BN. The lowest values of friction and wear coefficients were obtained when the composites were tested with the BN platelets oriented parallel to the sliding direction. The morphological study of the worn surfaces revealed generalised brittle intergranular icrocracking at the dispersoid/matrix interface as the main wear mechanism. Under the experimental conditions of this study, the formation of stable protective layers of the soft lubricious oxide H3BO3, or the solid lubricant BN·H2O, was not observed. |
id |
RCAP_2662e296bfad0db81c97c63ec05e5b36 |
---|---|
oai_identifier_str |
oai:repositorium.sdum.uminho.pt:1822/1561 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Tribological behaviour of Si3N4–BN ceramic materials for dry sliding applicationsTribological behaviourSi3N4–BN compositesSilicon nitrideDry slidingSi N -BN composites 3 4Science & TechnologyThe main objective of this paper is to help on the clarification of the lack of consensus in the bibliographic data concerning the tribological behaviour of Si3N4–BN omposites. Unlubricated sliding tests by pin-on-disc were carried out with three grades of composite materials with 10, 18 and 25 vol.% of BN. The addition of BN to the Si3N4 matrix resulted in a slight reduction of the friction coefficient, which decreased from 0.82 for monolithic Si3N4 to 0.67 for Si3N4–10%BN materials. Wear coefficients (K) were above 10−5 mm3 N−1 m−1 for all materials tested and increased sharply with increases in BN volume fraction greater than 10%, e.g. K ∼ 10−3 mm3 N−1 m−1 for Si3N4–25%BN. The lowest values of friction and wear coefficients were obtained when the composites were tested with the BN platelets oriented parallel to the sliding direction. The morphological study of the worn surfaces revealed generalised brittle intergranular icrocracking at the dispersoid/matrix interface as the main wear mechanism. Under the experimental conditions of this study, the formation of stable protective layers of the soft lubricious oxide H3BO3, or the solid lubricant BN·H2O, was not observed.ElsevierUniversidade do MinhoCarrapichano, J. M.Gomes, J. R.Silva, R. F.20022002-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/1561eng"Wear". ISSN 0043-1648. 253 (Aug. 2002) 1070-1076.0043-164810.1016/S0043-1648(02)00219-3info: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:RCAAP2023-07-21T12:14:20Zoai:repositorium.sdum.uminho.pt:1822/1561Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:06:38.512812Repositório 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 |
Tribological behaviour of Si3N4–BN ceramic materials for dry sliding applications |
title |
Tribological behaviour of Si3N4–BN ceramic materials for dry sliding applications |
spellingShingle |
Tribological behaviour of Si3N4–BN ceramic materials for dry sliding applications Carrapichano, J. M. Tribological behaviour Si3N4–BN composites Silicon nitride Dry sliding Si N -BN composites 3 4 Science & Technology |
title_short |
Tribological behaviour of Si3N4–BN ceramic materials for dry sliding applications |
title_full |
Tribological behaviour of Si3N4–BN ceramic materials for dry sliding applications |
title_fullStr |
Tribological behaviour of Si3N4–BN ceramic materials for dry sliding applications |
title_full_unstemmed |
Tribological behaviour of Si3N4–BN ceramic materials for dry sliding applications |
title_sort |
Tribological behaviour of Si3N4–BN ceramic materials for dry sliding applications |
author |
Carrapichano, J. M. |
author_facet |
Carrapichano, J. M. Gomes, J. R. Silva, R. F. |
author_role |
author |
author2 |
Gomes, J. R. Silva, R. F. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Carrapichano, J. M. Gomes, J. R. Silva, R. F. |
dc.subject.por.fl_str_mv |
Tribological behaviour Si3N4–BN composites Silicon nitride Dry sliding Si N -BN composites 3 4 Science & Technology |
topic |
Tribological behaviour Si3N4–BN composites Silicon nitride Dry sliding Si N -BN composites 3 4 Science & Technology |
description |
The main objective of this paper is to help on the clarification of the lack of consensus in the bibliographic data concerning the tribological behaviour of Si3N4–BN omposites. Unlubricated sliding tests by pin-on-disc were carried out with three grades of composite materials with 10, 18 and 25 vol.% of BN. The addition of BN to the Si3N4 matrix resulted in a slight reduction of the friction coefficient, which decreased from 0.82 for monolithic Si3N4 to 0.67 for Si3N4–10%BN materials. Wear coefficients (K) were above 10−5 mm3 N−1 m−1 for all materials tested and increased sharply with increases in BN volume fraction greater than 10%, e.g. K ∼ 10−3 mm3 N−1 m−1 for Si3N4–25%BN. The lowest values of friction and wear coefficients were obtained when the composites were tested with the BN platelets oriented parallel to the sliding direction. The morphological study of the worn surfaces revealed generalised brittle intergranular icrocracking at the dispersoid/matrix interface as the main wear mechanism. Under the experimental conditions of this study, the formation of stable protective layers of the soft lubricious oxide H3BO3, or the solid lubricant BN·H2O, was not observed. |
publishDate |
2002 |
dc.date.none.fl_str_mv |
2002 2002-01-01T00:00:00Z |
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/1822/1561 |
url |
http://hdl.handle.net/1822/1561 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
"Wear". ISSN 0043-1648. 253 (Aug. 2002) 1070-1076. 0043-1648 10.1016/S0043-1648(02)00219-3 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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 instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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 |
repository.mail.fl_str_mv |
|
_version_ |
1799132481649115136 |