Comparative studies of WC-Co-Ni composites obtained by conventional powder metallurgy
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Data de Publicação: | 2011 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/34285 |
Resumo: | The present work reports a comparative study of cemented carbides of compositions WC-6Co, WC-10Co, WC-20Co, WC-6Co-6Ni and WC-12Ni-6Co. The purpose was to study the powder metallurgical production process of these compositions starting from a commercial WC-6Co powder, obtaining the desired compositions by mass balance with pure Co and pure Ni powders. During the process steps mixing, milling, compacting and sintering the powders were described by its apparent density, green density, shrinkage and sintered density. Lower densities were observed in composites with higher binder content. The process was monitored by scanning electron microscopy and EDS analysis to evaluate the homogeneity of the powders, to detect contaminations by the process and to characterize the microstructure of the sintered materials. A finer microstructure was found when the binder contained Ni. Potentiodynamic polarization tests in sulfuric acid revealed pseudo-passive behavior for all the tested hard metals. |
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Martins, ViniciusRodrigues, Wilson CorreaFerrandini, Peterson LuizVillarinho, Denis JardimKnörnschild, Gerhard HansSchaeffer, Lirio2011-11-11T01:19:04Z20111516-1439http://hdl.handle.net/10183/34285000785110The present work reports a comparative study of cemented carbides of compositions WC-6Co, WC-10Co, WC-20Co, WC-6Co-6Ni and WC-12Ni-6Co. The purpose was to study the powder metallurgical production process of these compositions starting from a commercial WC-6Co powder, obtaining the desired compositions by mass balance with pure Co and pure Ni powders. During the process steps mixing, milling, compacting and sintering the powders were described by its apparent density, green density, shrinkage and sintered density. Lower densities were observed in composites with higher binder content. The process was monitored by scanning electron microscopy and EDS analysis to evaluate the homogeneity of the powders, to detect contaminations by the process and to characterize the microstructure of the sintered materials. A finer microstructure was found when the binder contained Ni. Potentiodynamic polarization tests in sulfuric acid revealed pseudo-passive behavior for all the tested hard metals.application/pdfengMaterials research : ibero-american journal of materials. vol. 14, n. 2, (June 2011), p. 274-279CompósitosMetalurgia do póPowder metallurgyHard metalWC-CoWC-Co-NiComparative studies of WC-Co-Ni composites obtained by conventional powder metallurgyinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000785110.pdf000785110.pdfTexto completo (inglês)application/pdf2090092http://www.lume.ufrgs.br/bitstream/10183/34285/1/000785110.pdf16a6ddac18d41c684661d47fa64e5bf6MD51TEXT000785110.pdf.txt000785110.pdf.txtExtracted Texttext/plain20059http://www.lume.ufrgs.br/bitstream/10183/34285/2/000785110.pdf.txtef5c797caecd13cde9e88c61a4051500MD52THUMBNAIL000785110.pdf.jpg000785110.pdf.jpgGenerated Thumbnailimage/jpeg1849http://www.lume.ufrgs.br/bitstream/10183/34285/3/000785110.pdf.jpgdec49515dc491a13a553beb9d0f436e1MD5310183/342852022-06-03 04:36:38.482758oai:www.lume.ufrgs.br:10183/34285Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2022-06-03T07:36:38Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Comparative studies of WC-Co-Ni composites obtained by conventional powder metallurgy |
title |
Comparative studies of WC-Co-Ni composites obtained by conventional powder metallurgy |
spellingShingle |
Comparative studies of WC-Co-Ni composites obtained by conventional powder metallurgy Martins, Vinicius Compósitos Metalurgia do pó Powder metallurgy Hard metal WC-Co WC-Co-Ni |
title_short |
Comparative studies of WC-Co-Ni composites obtained by conventional powder metallurgy |
title_full |
Comparative studies of WC-Co-Ni composites obtained by conventional powder metallurgy |
title_fullStr |
Comparative studies of WC-Co-Ni composites obtained by conventional powder metallurgy |
title_full_unstemmed |
Comparative studies of WC-Co-Ni composites obtained by conventional powder metallurgy |
title_sort |
Comparative studies of WC-Co-Ni composites obtained by conventional powder metallurgy |
author |
Martins, Vinicius |
author_facet |
Martins, Vinicius Rodrigues, Wilson Correa Ferrandini, Peterson Luiz Villarinho, Denis Jardim Knörnschild, Gerhard Hans Schaeffer, Lirio |
author_role |
author |
author2 |
Rodrigues, Wilson Correa Ferrandini, Peterson Luiz Villarinho, Denis Jardim Knörnschild, Gerhard Hans Schaeffer, Lirio |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Martins, Vinicius Rodrigues, Wilson Correa Ferrandini, Peterson Luiz Villarinho, Denis Jardim Knörnschild, Gerhard Hans Schaeffer, Lirio |
dc.subject.por.fl_str_mv |
Compósitos Metalurgia do pó |
topic |
Compósitos Metalurgia do pó Powder metallurgy Hard metal WC-Co WC-Co-Ni |
dc.subject.eng.fl_str_mv |
Powder metallurgy Hard metal WC-Co WC-Co-Ni |
description |
The present work reports a comparative study of cemented carbides of compositions WC-6Co, WC-10Co, WC-20Co, WC-6Co-6Ni and WC-12Ni-6Co. The purpose was to study the powder metallurgical production process of these compositions starting from a commercial WC-6Co powder, obtaining the desired compositions by mass balance with pure Co and pure Ni powders. During the process steps mixing, milling, compacting and sintering the powders were described by its apparent density, green density, shrinkage and sintered density. Lower densities were observed in composites with higher binder content. The process was monitored by scanning electron microscopy and EDS analysis to evaluate the homogeneity of the powders, to detect contaminations by the process and to characterize the microstructure of the sintered materials. A finer microstructure was found when the binder contained Ni. Potentiodynamic polarization tests in sulfuric acid revealed pseudo-passive behavior for all the tested hard metals. |
publishDate |
2011 |
dc.date.accessioned.fl_str_mv |
2011-11-11T01:19:04Z |
dc.date.issued.fl_str_mv |
2011 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
dc.type.status.fl_str_mv |
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article |
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http://hdl.handle.net/10183/34285 |
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1516-1439 |
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000785110 |
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http://hdl.handle.net/10183/34285 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Materials research : ibero-american journal of materials. vol. 14, n. 2, (June 2011), p. 274-279 |
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openAccess |
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