Conformação por spray da liga amorfizável a base de ferro [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/742 |
Resumo: | The use of amorphous metals becomes a large market in the industry of micro-components and/or milimetric machine parts, presenting excellent magnetic and mechanical properties and high glass forming ability such as the recent developed iron based alloys in the [(FexCo1-x)0.75B0.2Si0.05]96Nb4 compositions, where x = 0.1-0.5 at.%. Wherever, these properties are reached when this material is processed by techniques that impose and maintain higher cooling rates (103-106 K/s), limiting factors in order to obtain amorphous parts with centimeters in dimension. In this study, the Fe43.2Co28.8B19.2Si4.8Nb4 alloy was processed by spray forming as an alternative route to obtain amorphous deposits with large sizes. The study conducted depositions onto rotating copper rollers generating a co-lamination condition, producing larger ribbons. In a second step, depositions in industrial scale were performed using preheated cylindrical and flat substrates moving longitudinally at various speeds, producing deposits with different thickness. In a third deposition, subsequent layers were deposited due the came and back longitudinal movement of the cylindrical substrate. The microstructure of all materials were evaluated by optical and scanning electron microscopy, differential scanning calorimetry, and X-ray diffraction. The powders of all experiments and the spray-co-laminated ribbons presented fully amorphous microstructure. The first and second deposits exhibited a 1 to 2.5 mm thickness amorphous layer formed in direct contact with the substrate. The median/central regions (10 to 15 mm thickness) presented a mix of crystalline and amorphous phases or fully crystalline microstructure depending the thickness of the deposit. The third deposit was formed by ~10 layers with ~2 mm thickness each presenting fully amorphous or a mix of crystalline and amorphous phases. These results suggesting that this process is a promising potential for the production of amorphous alloys in large volumes and sizes, expanding the use of these materials. |
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Cava, Régis DanielBolfarini, Claudemirohttp://lattes.cnpq.br/9231627080617037http://lattes.cnpq.br/42045172731406132016-06-02T19:10:30Z2015-05-122016-06-02T19:10:30Z2015-10-29CAVA, Régis Daniel. Spray forming of iron based [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4 glass forming alloy. 2015. 152 f. Tese (Doutorado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2015.https://repositorio.ufscar.br/handle/ufscar/742The use of amorphous metals becomes a large market in the industry of micro-components and/or milimetric machine parts, presenting excellent magnetic and mechanical properties and high glass forming ability such as the recent developed iron based alloys in the [(FexCo1-x)0.75B0.2Si0.05]96Nb4 compositions, where x = 0.1-0.5 at.%. Wherever, these properties are reached when this material is processed by techniques that impose and maintain higher cooling rates (103-106 K/s), limiting factors in order to obtain amorphous parts with centimeters in dimension. In this study, the Fe43.2Co28.8B19.2Si4.8Nb4 alloy was processed by spray forming as an alternative route to obtain amorphous deposits with large sizes. The study conducted depositions onto rotating copper rollers generating a co-lamination condition, producing larger ribbons. In a second step, depositions in industrial scale were performed using preheated cylindrical and flat substrates moving longitudinally at various speeds, producing deposits with different thickness. In a third deposition, subsequent layers were deposited due the came and back longitudinal movement of the cylindrical substrate. The microstructure of all materials were evaluated by optical and scanning electron microscopy, differential scanning calorimetry, and X-ray diffraction. The powders of all experiments and the spray-co-laminated ribbons presented fully amorphous microstructure. The first and second deposits exhibited a 1 to 2.5 mm thickness amorphous layer formed in direct contact with the substrate. The median/central regions (10 to 15 mm thickness) presented a mix of crystalline and amorphous phases or fully crystalline microstructure depending the thickness of the deposit. The third deposit was formed by ~10 layers with ~2 mm thickness each presenting fully amorphous or a mix of crystalline and amorphous phases. These results suggesting that this process is a promising potential for the production of amorphous alloys in large volumes and sizes, expanding the use of these materials.O uso de metais amorfos tornou-se um grande Mercado na indústria de micro-componentes e/ou peças milimétricas apresentando excelentes propriedades magnéticas e mecânicas e alta tendência de formação de fase amorfa como a recém desenvolvida liga amorfizável a base de ferro com composição [(FexCo1-x)0.75B0.2Si0.05]96Nb4, x = 0.1-0.5 at.%. No entanto, essas propriedades são atingidas quando esse material é processado por técnicas que impõe e mantém altas taxas de resfriamento (103-106 K/s), fatores limitantes para obtenção de peças amorfas com dimensão de centímetros. Nesse estudo a liga Fe43.2Co28.8B19.2Si4.8Nb4 foi processada por conformação por spray como uma rota alternativa para obtenção de depósitos de grandes dimensões. O estudo conduziu deposições sobre rolos de cobre rotativos, gerando uma condição de co-laminação produzindo grandes fitas. Em uma segunda etapa, foram realizadas deposições em escala industrial usando substratos cilíndricos e planos pré-aquecidos movendo-se longitudinalmente em várias velocidades, produzindo depósitos com diferentes espessuras. Em uma terceira deposição, camadas subseqüentes foram depositadas devido ao movimento de ida e vinda do substrato cilíndrico. As microestruturas de todos os materiais obtidos foram avaliadas por microscopia ótica e eletrônica de varredura, calorimetria diferencial de varredura e difração de Raios-X. Os pós de todos os experimentos e as fitas obtidas por co-laminação apresentaram microestrutura totalmente amorfa. O primeiro e segundo depósitos exibiram uma camada amorfa de 1- 2,5 mm de espessura formada em contato direto com o substrato. As regiões média/central dos depósitos apresentaram uma mistura de fases cristalinas e amorfa ou fases totalmente cristalinas dependendo da espessura do depósito. O terceiro depósito foi formado por ~10 camadas com ~2 mm de espessura cada apresentando microestrutura totalmente amorfa ou uma mistura de fases cristalinas e amorfa. Esses resultados sugerem que esse processo apresenta-se como um potencial promissor para a produção desse tipo de liga em grandes volumes e tamanhos, expandindo o uso desses materiais.Universidade Federal de Sao Carlosapplication/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMUFSCarBRLigas (Metalurgia)Ligas de ferroConformação por sprayMetal amorfoCaracterização microestruturalENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICAConformação por spray da liga amorfizável a base de ferro [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4Spray forming of iron based [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4 glass forming alloyinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINAL6755.pdfapplication/pdf7447170https://{{ getenv "DSPACE_HOST" "repositorio.ufscar.br" }}/bitstream/ufscar/742/1/6755.pdf8d5fb11251a7f6c0476faf234c8328afMD51TEXT6755.pdf.txt6755.pdf.txtExtracted texttext/plain0https://{{ getenv "DSPACE_HOST" "repositorio.ufscar.br" }}/bitstream/ufscar/742/2/6755.pdf.txtd41d8cd98f00b204e9800998ecf8427eMD52THUMBNAIL6755.pdf.jpg6755.pdf.jpgIM Thumbnailimage/jpeg5818https://{{ getenv "DSPACE_HOST" "repositorio.ufscar.br" }}/bitstream/ufscar/742/3/6755.pdf.jpg7455bac9968a86fe5b852ea2a2688b71MD53ufscar/7422019-09-11 04:03:50.223oai:repositorio.ufscar.br:ufscar/742Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222019-09-11T04:03:50Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Conformação por spray da liga amorfizável a base de ferro [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4 |
dc.title.alternative.eng.fl_str_mv |
Spray forming of iron based [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4 glass forming alloy |
title |
Conformação por spray da liga amorfizável a base de ferro [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4 |
spellingShingle |
Conformação por spray da liga amorfizável a base de ferro [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4 Cava, Régis Daniel Ligas (Metalurgia) Ligas de ferro Conformação por spray Metal amorfo Caracterização microestrutural ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
title_short |
Conformação por spray da liga amorfizável a base de ferro [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4 |
title_full |
Conformação por spray da liga amorfizável a base de ferro [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4 |
title_fullStr |
Conformação por spray da liga amorfizável a base de ferro [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4 |
title_full_unstemmed |
Conformação por spray da liga amorfizável a base de ferro [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4 |
title_sort |
Conformação por spray da liga amorfizável a base de ferro [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4 |
author |
Cava, Régis Daniel |
author_facet |
Cava, Régis Daniel |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/4204517273140613 |
dc.contributor.author.fl_str_mv |
Cava, Régis Daniel |
dc.contributor.advisor1.fl_str_mv |
Bolfarini, Claudemiro |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/9231627080617037 |
contributor_str_mv |
Bolfarini, Claudemiro |
dc.subject.por.fl_str_mv |
Ligas (Metalurgia) Ligas de ferro Conformação por spray Metal amorfo Caracterização microestrutural |
topic |
Ligas (Metalurgia) Ligas de ferro Conformação por spray Metal amorfo Caracterização microestrutural ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
description |
The use of amorphous metals becomes a large market in the industry of micro-components and/or milimetric machine parts, presenting excellent magnetic and mechanical properties and high glass forming ability such as the recent developed iron based alloys in the [(FexCo1-x)0.75B0.2Si0.05]96Nb4 compositions, where x = 0.1-0.5 at.%. Wherever, these properties are reached when this material is processed by techniques that impose and maintain higher cooling rates (103-106 K/s), limiting factors in order to obtain amorphous parts with centimeters in dimension. In this study, the Fe43.2Co28.8B19.2Si4.8Nb4 alloy was processed by spray forming as an alternative route to obtain amorphous deposits with large sizes. The study conducted depositions onto rotating copper rollers generating a co-lamination condition, producing larger ribbons. In a second step, depositions in industrial scale were performed using preheated cylindrical and flat substrates moving longitudinally at various speeds, producing deposits with different thickness. In a third deposition, subsequent layers were deposited due the came and back longitudinal movement of the cylindrical substrate. The microstructure of all materials were evaluated by optical and scanning electron microscopy, differential scanning calorimetry, and X-ray diffraction. The powders of all experiments and the spray-co-laminated ribbons presented fully amorphous microstructure. The first and second deposits exhibited a 1 to 2.5 mm thickness amorphous layer formed in direct contact with the substrate. The median/central regions (10 to 15 mm thickness) presented a mix of crystalline and amorphous phases or fully crystalline microstructure depending the thickness of the deposit. The third deposit was formed by ~10 layers with ~2 mm thickness each presenting fully amorphous or a mix of crystalline and amorphous phases. These results suggesting that this process is a promising potential for the production of amorphous alloys in large volumes and sizes, expanding the use of these materials. |
publishDate |
2015 |
dc.date.available.fl_str_mv |
2015-05-12 2016-06-02T19:10:30Z |
dc.date.issued.fl_str_mv |
2015-10-29 |
dc.date.accessioned.fl_str_mv |
2016-06-02T19:10:30Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
CAVA, Régis Daniel. Spray forming of iron based [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4 glass forming alloy. 2015. 152 f. Tese (Doutorado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2015. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/742 |
identifier_str_mv |
CAVA, Régis Daniel. Spray forming of iron based [(Fe0,6Co0,4)0,75B0,2Si0,05]96Nb4 glass forming alloy. 2015. 152 f. Tese (Doutorado em Ciências Exatas e da Terra) - Universidade Federal de São Carlos, São Carlos, 2015. |
url |
https://repositorio.ufscar.br/handle/ufscar/742 |
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por |
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por |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Universidade Federal de São Carlos |
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Programa de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEM |
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UFSCar |
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BR |
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Universidade Federal de São Carlos |
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