Evaluation of Y2O3 as front layer of ceramic crucibles for vaccum induction melting of tial based alloys

Detalhes bibliográficos
Autor(a) principal: Barbosa, J.
Data de Publicação: 2005
Outros Autores: Ribeiro, Carlos Silva, Teodoro, O. M. N. D., Monteiro, A. Caetano
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/1822/12503
Resumo: During the last decades titanium alloys were found to be valuable engineering materials for many different applications. Formerly used in critical applications like aerospace, aeronautic and military equipment, where the factor cost is not relevant, titanium alloys are finding now new and different markets. However, the development of such new markets will depend on an effective cost reduction of titanium parts, in order to achieve a selling cost suitable with its application in consumer goods. A possible solution to decrease production costs might be the use of traditional casting techniques to produce near net shape functional parts. During the last years, the authors have developed extensive research work on this field, and a new technique both for melting and moulding, using ceramic multi-layered crucibles and investment casting shells was developed. This paper presents some of the results obtained during that research work: Ti-48Al alloy were melted and cooled inside CaO, MgO and Y2O3 stabilized ZrO2 crucibles with inside layer of Y2O3. The chemical composition, hardness and microstructure at the metal-crucible interface, studied by secondary ion mass spectrometry, SEM/EDS and XRS are presented. On a second step, the same alloy was melted on the same crucibles, and poured into graphite moulds, and the crucibles wall was characterized by SEM/EDS and XRS.
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spelling Evaluation of Y2O3 as front layer of ceramic crucibles for vaccum induction melting of tial based alloysTiAlTitaniumMeltingCrucibleYttriaCeramic CrucibleInduction MeltingDuring the last decades titanium alloys were found to be valuable engineering materials for many different applications. Formerly used in critical applications like aerospace, aeronautic and military equipment, where the factor cost is not relevant, titanium alloys are finding now new and different markets. However, the development of such new markets will depend on an effective cost reduction of titanium parts, in order to achieve a selling cost suitable with its application in consumer goods. A possible solution to decrease production costs might be the use of traditional casting techniques to produce near net shape functional parts. During the last years, the authors have developed extensive research work on this field, and a new technique both for melting and moulding, using ceramic multi-layered crucibles and investment casting shells was developed. This paper presents some of the results obtained during that research work: Ti-48Al alloy were melted and cooled inside CaO, MgO and Y2O3 stabilized ZrO2 crucibles with inside layer of Y2O3. The chemical composition, hardness and microstructure at the metal-crucible interface, studied by secondary ion mass spectrometry, SEM/EDS and XRS are presented. On a second step, the same alloy was melted on the same crucibles, and poured into graphite moulds, and the crucibles wall was characterized by SEM/EDS and XRS.(undefined)Institute of Materials, Minerals and Mining. Iron & Steel Society (IOM3)Universidade do MinhoBarbosa, J.Ribeiro, Carlos SilvaTeodoro, O. M. N. D.Monteiro, A. Caetano20052005-01-01T00:00:00Zconference paperinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/1822/12503engSCHLESINGER, M. E., ed. – “EPD Congress 2005 proceedings of sessions and symposia sponsored by the Extraction and Processing Division (EPD) of the TMS (The Minerals, Metals & Materials Society) held during the 2005 TMS Annual Meeting, San Francisco, Californa, 2005. Warrendale : TMS, 2005. ISBN 0-87339-581-6. p. 573-584.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:RCAAP2024-05-11T07:17:08Zoai:repositorium.sdum.uminho.pt:1822/12503Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-11T07:17:08Repositório 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 Evaluation of Y2O3 as front layer of ceramic crucibles for vaccum induction melting of tial based alloys
title Evaluation of Y2O3 as front layer of ceramic crucibles for vaccum induction melting of tial based alloys
spellingShingle Evaluation of Y2O3 as front layer of ceramic crucibles for vaccum induction melting of tial based alloys
Barbosa, J.
TiAl
Titanium
Melting
Crucible
Yttria
Ceramic Crucible
Induction Melting
title_short Evaluation of Y2O3 as front layer of ceramic crucibles for vaccum induction melting of tial based alloys
title_full Evaluation of Y2O3 as front layer of ceramic crucibles for vaccum induction melting of tial based alloys
title_fullStr Evaluation of Y2O3 as front layer of ceramic crucibles for vaccum induction melting of tial based alloys
title_full_unstemmed Evaluation of Y2O3 as front layer of ceramic crucibles for vaccum induction melting of tial based alloys
title_sort Evaluation of Y2O3 as front layer of ceramic crucibles for vaccum induction melting of tial based alloys
author Barbosa, J.
author_facet Barbosa, J.
Ribeiro, Carlos Silva
Teodoro, O. M. N. D.
Monteiro, A. Caetano
author_role author
author2 Ribeiro, Carlos Silva
Teodoro, O. M. N. D.
Monteiro, A. Caetano
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Barbosa, J.
Ribeiro, Carlos Silva
Teodoro, O. M. N. D.
Monteiro, A. Caetano
dc.subject.por.fl_str_mv TiAl
Titanium
Melting
Crucible
Yttria
Ceramic Crucible
Induction Melting
topic TiAl
Titanium
Melting
Crucible
Yttria
Ceramic Crucible
Induction Melting
description During the last decades titanium alloys were found to be valuable engineering materials for many different applications. Formerly used in critical applications like aerospace, aeronautic and military equipment, where the factor cost is not relevant, titanium alloys are finding now new and different markets. However, the development of such new markets will depend on an effective cost reduction of titanium parts, in order to achieve a selling cost suitable with its application in consumer goods. A possible solution to decrease production costs might be the use of traditional casting techniques to produce near net shape functional parts. During the last years, the authors have developed extensive research work on this field, and a new technique both for melting and moulding, using ceramic multi-layered crucibles and investment casting shells was developed. This paper presents some of the results obtained during that research work: Ti-48Al alloy were melted and cooled inside CaO, MgO and Y2O3 stabilized ZrO2 crucibles with inside layer of Y2O3. The chemical composition, hardness and microstructure at the metal-crucible interface, studied by secondary ion mass spectrometry, SEM/EDS and XRS are presented. On a second step, the same alloy was melted on the same crucibles, and poured into graphite moulds, and the crucibles wall was characterized by SEM/EDS and XRS.
publishDate 2005
dc.date.none.fl_str_mv 2005
2005-01-01T00:00:00Z
dc.type.driver.fl_str_mv conference paper
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/1822/12503
url http://hdl.handle.net/1822/12503
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv SCHLESINGER, M. E., ed. – “EPD Congress 2005 proceedings of sessions and symposia sponsored by the Extraction and Processing Division (EPD) of the TMS (The Minerals, Metals & Materials Society) held during the 2005 TMS Annual Meeting, San Francisco, Californa, 2005. Warrendale : TMS, 2005. ISBN 0-87339-581-6. p. 573-584.
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 Institute of Materials, Minerals and Mining. Iron & Steel Society (IOM3)
publisher.none.fl_str_mv Institute of Materials, Minerals and Mining. Iron & Steel Society (IOM3)
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 mluisa.alvim@gmail.com
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