Production of ultrafine-grained spherical β-WC-W2C-Co microparticles by electro discharge erosion of WC-15Co alloy in glycerol and their solutions
The present work is devoted to the study of the production of ultrafine-grained (UFG) spherical microparticles by electro discharge erosion (EDE) of the WC-15Co cemented carbide in glycerol, distilled water, and their solutions. Energy costs, productivity, particle size distribution, and morphologic...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/abb0d6 |
| _version_ | 1797746169156206592 |
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| author | Maksim Dvornik Elena Mikhailenko Sergey Nikolenko Nuria Vlasova Andrey Skiruta |
| author_facet | Maksim Dvornik Elena Mikhailenko Sergey Nikolenko Nuria Vlasova Andrey Skiruta |
| author_sort | Maksim Dvornik |
| collection | DOAJ |
| description | The present work is devoted to the study of the production of ultrafine-grained (UFG) spherical microparticles by electro discharge erosion (EDE) of the WC-15Co cemented carbide in glycerol, distilled water, and their solutions. Energy costs, productivity, particle size distribution, and morphological and chemical compositions of the obtained powders were studied. It was found that energy cost is reduced by 2.2 times when glycerol was used instead of water. The use of water reduces carbon content from 5.2% to 1.4%. The use of glycerol and its aqueous solutions reduces carbon loss and increases its content in the obtained powders from 3.2% to 6.1%. During SE, cobalt, carbon, and tungsten evaporate from spherical particles and crystallize in the form of ultrafine particles, which subsequently remain in suspension after sedimentation of spherical particles. Mass fractions of sedimented spherical particle fractions ranged from 75% to 82%. Cobalt and carbon content in the spherical particles obtained in glycerol decrease from 15% to 10% and from 5.2% t to 3.1% respectively. The particles consist of rounded carbide grains ( β -WC and W _2 C) with a diameter of up to 500 nm, the space between which is filled with cobalt. Microhardness of the particles increased from 12.1 GPa (initial alloy) to 15.6 (EDE in water)—23.7 GPa (EDE in glycerol). |
| first_indexed | 2024-03-12T15:34:07Z |
| format | Article |
| id | doaj.art-20dae853d8964794830d29bbb8b1ed35 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:34:07Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-20dae853d8964794830d29bbb8b1ed352023-08-09T16:18:53ZengIOP PublishingMaterials Research Express2053-15912020-01-017909650410.1088/2053-1591/abb0d6Production of ultrafine-grained spherical β-WC-W2C-Co microparticles by electro discharge erosion of WC-15Co alloy in glycerol and their solutionsMaksim Dvornik0https://orcid.org/0000-0002-1216-4438Elena Mikhailenko1Sergey Nikolenko2Nuria Vlasova3Andrey Skiruta4Institute of Materials Science, FEB RAS, Russian FederationInstitute of Materials Science, FEB RAS, Russian FederationInstitute of Materials Science, FEB RAS, Russian FederationInstitute of Materials Science, FEB RAS, Russian FederationInstitute of Materials Science, FEB RAS, Russian FederationThe present work is devoted to the study of the production of ultrafine-grained (UFG) spherical microparticles by electro discharge erosion (EDE) of the WC-15Co cemented carbide in glycerol, distilled water, and their solutions. Energy costs, productivity, particle size distribution, and morphological and chemical compositions of the obtained powders were studied. It was found that energy cost is reduced by 2.2 times when glycerol was used instead of water. The use of water reduces carbon content from 5.2% to 1.4%. The use of glycerol and its aqueous solutions reduces carbon loss and increases its content in the obtained powders from 3.2% to 6.1%. During SE, cobalt, carbon, and tungsten evaporate from spherical particles and crystallize in the form of ultrafine particles, which subsequently remain in suspension after sedimentation of spherical particles. Mass fractions of sedimented spherical particle fractions ranged from 75% to 82%. Cobalt and carbon content in the spherical particles obtained in glycerol decrease from 15% to 10% and from 5.2% t to 3.1% respectively. The particles consist of rounded carbide grains ( β -WC and W _2 C) with a diameter of up to 500 nm, the space between which is filled with cobalt. Microhardness of the particles increased from 12.1 GPa (initial alloy) to 15.6 (EDE in water)—23.7 GPa (EDE in glycerol).https://doi.org/10.1088/2053-1591/abb0d6tungsten carbidespherical particlesmicrohardnesscarbon contentelectro-discharge erosion |
| spellingShingle | Maksim Dvornik Elena Mikhailenko Sergey Nikolenko Nuria Vlasova Andrey Skiruta Production of ultrafine-grained spherical β-WC-W2C-Co microparticles by electro discharge erosion of WC-15Co alloy in glycerol and their solutions Materials Research Express tungsten carbide spherical particles microhardness carbon content electro-discharge erosion |
| title | Production of ultrafine-grained spherical β-WC-W2C-Co microparticles by electro discharge erosion of WC-15Co alloy in glycerol and their solutions |
| title_full | Production of ultrafine-grained spherical β-WC-W2C-Co microparticles by electro discharge erosion of WC-15Co alloy in glycerol and their solutions |
| title_fullStr | Production of ultrafine-grained spherical β-WC-W2C-Co microparticles by electro discharge erosion of WC-15Co alloy in glycerol and their solutions |
| title_full_unstemmed | Production of ultrafine-grained spherical β-WC-W2C-Co microparticles by electro discharge erosion of WC-15Co alloy in glycerol and their solutions |
| title_short | Production of ultrafine-grained spherical β-WC-W2C-Co microparticles by electro discharge erosion of WC-15Co alloy in glycerol and their solutions |
| title_sort | production of ultrafine grained spherical β wc w2c co microparticles by electro discharge erosion of wc 15co alloy in glycerol and their solutions |
| topic | tungsten carbide spherical particles microhardness carbon content electro-discharge erosion |
| url | https://doi.org/10.1088/2053-1591/abb0d6 |
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