Control of eta carbide formation in tungsten carbide powders sputter-coated with (Fe/Ni/Cr)
Autor(a) principal: | |
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Data de Publicação: | 2007 |
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/10316/4201 https://doi.org/10.1016/j.ijrmhm.2006.07.004 |
Resumo: | Composite powders of tungsten carbide with variable coating contents of Fe/Ni/Cr based alloys (1-15 wt.%) were prepared by sputtering. The coated powders have revealed a good performance to shape-forming and sintering. However, the presence of nanocrystalline coatings could enhance the formation of a brittle phase during sintering, named [eta]-phase, (M, W)6C. To investigate this effect, the powders were heat-treated at variable temperatures, up to 1400 °C. For comparison, conventionally prepared powders were studied, too, and the content of [eta]-phase was found to be higher for the sputter-coated ones. This result is attributed to the content of binder elements with affinity to carbon, like chromium, enhanced by the difference on binder characteristics, such as nanocrystallinity and morphology. It was concluded that an effective control of the reaction can be achieved by increasing in the binder composition the ratio between the elements without affinity and those with affinity to carbon and/or enlarging the carbon content. |
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Control of eta carbide formation in tungsten carbide powders sputter-coated with (Fe/Ni/Cr)Tungsten carbideCoated powdersFe/Ni/Cr[eta]-phaseComposite powders of tungsten carbide with variable coating contents of Fe/Ni/Cr based alloys (1-15 wt.%) were prepared by sputtering. The coated powders have revealed a good performance to shape-forming and sintering. However, the presence of nanocrystalline coatings could enhance the formation of a brittle phase during sintering, named [eta]-phase, (M, W)6C. To investigate this effect, the powders were heat-treated at variable temperatures, up to 1400 °C. For comparison, conventionally prepared powders were studied, too, and the content of [eta]-phase was found to be higher for the sputter-coated ones. This result is attributed to the content of binder elements with affinity to carbon, like chromium, enhanced by the difference on binder characteristics, such as nanocrystallinity and morphology. It was concluded that an effective control of the reaction can be achieved by increasing in the binder composition the ratio between the elements without affinity and those with affinity to carbon and/or enlarging the carbon content.http://www.sciencedirect.com/science/article/B6TY1-4MBJY6R-1/1/f383fedbf0fa61a789c1d40bd9608baf2007info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/4201http://hdl.handle.net/10316/4201https://doi.org/10.1016/j.ijrmhm.2006.07.004engInternational Journal of Refractory Metals and Hard Materials. 25:4 (2007) 310-317Fernandes, C. M.Senos, A. M. R.Vieira, M. T.info: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:RCAAP2020-11-06T16:49:07Zoai:estudogeral.uc.pt:10316/4201Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:58:27.061401Repositório 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 |
Control of eta carbide formation in tungsten carbide powders sputter-coated with (Fe/Ni/Cr) |
title |
Control of eta carbide formation in tungsten carbide powders sputter-coated with (Fe/Ni/Cr) |
spellingShingle |
Control of eta carbide formation in tungsten carbide powders sputter-coated with (Fe/Ni/Cr) Fernandes, C. M. Tungsten carbide Coated powders Fe/Ni/Cr [eta]-phase |
title_short |
Control of eta carbide formation in tungsten carbide powders sputter-coated with (Fe/Ni/Cr) |
title_full |
Control of eta carbide formation in tungsten carbide powders sputter-coated with (Fe/Ni/Cr) |
title_fullStr |
Control of eta carbide formation in tungsten carbide powders sputter-coated with (Fe/Ni/Cr) |
title_full_unstemmed |
Control of eta carbide formation in tungsten carbide powders sputter-coated with (Fe/Ni/Cr) |
title_sort |
Control of eta carbide formation in tungsten carbide powders sputter-coated with (Fe/Ni/Cr) |
author |
Fernandes, C. M. |
author_facet |
Fernandes, C. M. Senos, A. M. R. Vieira, M. T. |
author_role |
author |
author2 |
Senos, A. M. R. Vieira, M. T. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Fernandes, C. M. Senos, A. M. R. Vieira, M. T. |
dc.subject.por.fl_str_mv |
Tungsten carbide Coated powders Fe/Ni/Cr [eta]-phase |
topic |
Tungsten carbide Coated powders Fe/Ni/Cr [eta]-phase |
description |
Composite powders of tungsten carbide with variable coating contents of Fe/Ni/Cr based alloys (1-15 wt.%) were prepared by sputtering. The coated powders have revealed a good performance to shape-forming and sintering. However, the presence of nanocrystalline coatings could enhance the formation of a brittle phase during sintering, named [eta]-phase, (M, W)6C. To investigate this effect, the powders were heat-treated at variable temperatures, up to 1400 °C. For comparison, conventionally prepared powders were studied, too, and the content of [eta]-phase was found to be higher for the sputter-coated ones. This result is attributed to the content of binder elements with affinity to carbon, like chromium, enhanced by the difference on binder characteristics, such as nanocrystallinity and morphology. It was concluded that an effective control of the reaction can be achieved by increasing in the binder composition the ratio between the elements without affinity and those with affinity to carbon and/or enlarging the carbon content. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007 |
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/10316/4201 http://hdl.handle.net/10316/4201 https://doi.org/10.1016/j.ijrmhm.2006.07.004 |
url |
http://hdl.handle.net/10316/4201 https://doi.org/10.1016/j.ijrmhm.2006.07.004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
International Journal of Refractory Metals and Hard Materials. 25:4 (2007) 310-317 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
aplication/PDF |
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 |
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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) |
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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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1799133875839959040 |