DC Field | Value | Language |
---|---|---|
dc.contributor.author | Cha, SI | ko |
dc.contributor.author | Kim, BK | ko |
dc.contributor.author | Hong, Soon-Hyung | ko |
dc.date.accessioned | 2013-03-06T03:03:43Z | - |
dc.date.available | 2013-03-06T03:03:43Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2002-07 | - |
dc.identifier.citation | RARE METALS, v.21, pp.130 - 135 | - |
dc.identifier.issn | 1001-0521 | - |
dc.identifier.uri | http://hdl.handle.net/10203/85627 | - |
dc.description.abstract | Mechanical properties and microstructure of nanocrystalline WC-10Co cemented carbides were investigated. The nanocrystalline WC-10Co cemented carbide powders were manufactured by reduction and carbonization of the nano-crystalline precursor powders which were prepared by the spray drying process the of solution containing ammonia meta-tungstate (AMT) and cobalt nitrate. The WC powders which diameter were about 100 nm mixed homogeneously with Co binder phase and were sintered at 1375°C under the pressure of 1 mtorr. In order to compare the microstructure and mechanical properties with the nanocrystalline WC-10Co, commercial WC powders with diameters of 0.57-4 μm were mixed with Co powders, and were sintered at the same condition with that of nanocrystalline powders. TaC, Cr3C2 and VC of varying amounts were added into nanocrystalline WC-10Co cemented carbides as grain growth inhibitors. To investigate the microstructure of Co binder phase in the WC-10Co cemented carbides, a Co-W-C alloy was fabricated at the temperature of sintering process for the WC-10Co cemented carbides. The hardness of WC-10Co cemented carbides increased with decreasing the WC grain size following the Hall-Petch type relationship. The fracture toughness of WC-10Co cemented carbides increases with increasing the HCP/FCC ratio of Co binder phase by HCP/FCC phase transformation. | - |
dc.language | English | - |
dc.publisher | Chinese Society of Nonferrous Metal | - |
dc.title | Microstructure and mechanical properties of WC-10Co cemented carbides sintered from nanocrystalline spray conversion processed powders | - |
dc.type | Article | - |
dc.identifier.scopusid | 2-s2.0-0036658774 | - |
dc.type.rims | ART | - |
dc.citation.volume | 21 | - |
dc.citation.beginningpage | 130 | - |
dc.citation.endingpage | 135 | - |
dc.citation.publicationname | RARE METALS | - |
dc.contributor.localauthor | Hong, Soon-Hyung | - |
dc.contributor.nonIdAuthor | Cha, SI | - |
dc.contributor.nonIdAuthor | Kim, BK | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Fracture toughness | - |
dc.subject.keywordAuthor | Hardness | - |
dc.subject.keywordAuthor | Nanocrystalline | - |
dc.subject.keywordAuthor | WC-Co cemented carbides | - |
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