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Synthesis and processing of nanocrystalline tungsten carbide: Towards cemented carbides with optimal mechanical properties
dc.contributor.author | Bonache Bezares, Victoria | |
dc.contributor.author | Salvador Moya, María Dolores | |
dc.contributor.author | Busquets Mataix, David Jerónimo | |
dc.contributor.author | Burguete, Pedro | |
dc.contributor.author | Martínez, Eduardo | |
dc.contributor.author | Sapiña, Fernando | |
dc.contributor.author | Sánchez-Vilches, Enrique | |
dc.date.accessioned | 2012-10-10T15:25:54Z | |
dc.date.available | 2012-10-10T15:25:54Z | |
dc.date.issued | 2011-01 | |
dc.identifier.citation | International Journal of Refractory Metals and Hard Materials(Jan. 2011), vol. 29, no. 1, 78–84 | ca_CA |
dc.identifier.issn | 0263-4368 | |
dc.identifier.uri | http://hdl.handle.net/10234/48439 | |
dc.description.abstract | Nanocrystalline tungsten carbide has been obtained by reduction/carburization at low temperature from precursors obtained by freeze-drying of aqueous solutions. Nanocrystalline WC powders with a adequate content of carbon were mixed with submicrometric Cobalt powder (12 wt.%), obtained by same synthesis method, and sintered in vacuum furnace. The cemented carbides fabricated from experimental powders were compared with both commercial ultrafine and nanocrystalline WC-12Co mixtures consolidated by the same route. The synthesised powders were characterized by X-ray powder diffraction, elemental analysis and scanning and high resolution transmission electron microscopy. On the other hand, density, microstructure, hardness and fracture toughness together with X-ray diffraction analysis of the sintered materials were evaluated. The cemented carbides obtained from synthesised powders exhibited a WC platelet-based homogeneous microstructure. This anisotropic growth might be due to the presence of stacking faults parallel to the basal plane in the starting WC powder, which would promote the defect-assisted preferential growth. These materials showed excellent mechanical properties, with a superior hardness/fracture toughness combination compared to materials prepared from commercial mixtures. | ca_CA |
dc.format.extent | 7 p. | ca_CA |
dc.format.mimetype | application/pdf | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | Elsevier | ca_CA |
dc.rights | © 2010 Elsevier | ca_CA |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | * |
dc.subject | Freeze-drying precursors | ca_CA |
dc.subject | Nanocrystalline WC | ca_CA |
dc.subject | Mechanical properties | ca_CA |
dc.subject | Platelets | ca_CA |
dc.subject | Cemented carbides | ca_CA |
dc.title | Synthesis and processing of nanocrystalline tungsten carbide: Towards cemented carbides with optimal mechanical properties | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.identifier.doi | http://dx.doi.org/10.1016/j.ijrmhm.2010.08.003 | |
dc.rights.accessRights | info:eu-repo/semantics/restrictedAccess | ca_CA |
dc.relation.publisherVersion | http://www.sciencedirect.com/science/article/pii/S0263436810001095 | ca_CA |
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