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dc.contributor.authorMartins, Viniciuspt_BR
dc.contributor.authorRodrigues, Wilson Correapt_BR
dc.contributor.authorFerrandini, Peterson Luizpt_BR
dc.contributor.authorVillarinho, Denis Jardimpt_BR
dc.contributor.authorKnörnschild, Gerhard Hanspt_BR
dc.contributor.authorSchaeffer, Liriopt_BR
dc.date.accessioned2011-11-11T01:19:04Zpt_BR
dc.date.issued2011pt_BR
dc.identifier.issn1516-1439pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/34285pt_BR
dc.description.abstractThe 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.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofMaterials research : ibero-american journal of materials. vol. 14, n. 2, (June 2011), p. 274-279pt_BR
dc.rightsOpen Accessen
dc.subjectCompósitospt_BR
dc.subjectPowder metallurgyen
dc.subjectHard metalen
dc.subjectMetalurgia do pópt_BR
dc.subjectWC-Coen
dc.subjectWC-Co-Nien
dc.titleComparative studies of WC-Co-Ni composites obtained by conventional powder metallurgypt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000785110pt_BR
dc.type.originNacionalpt_BR


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