Processing, Microstructure And Properties Of In Situ Copper Reinforced Tungsten Carbide Nanostructured Composite
The present work investigates characteristics and properties of in situ nanostructured copper-tungsten carbide composite prepared by mechanical alloying (MA) and powder metallurgy (PM). Elemental powders of Cu (copper), W (tungsten) and graphite (C) were milled in a planetary ball mill using differe...
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| Format: | Thesis |
| Language: | en |
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2012
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| Online Access: | http://eprints.usm.my/41987/1/MAHANI_BINTI_YUSOFF.pdf http://eprints.usm.my/41987/ |
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| _version_ | 1834502458144980992 |
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| author | Yusoff, Mahani |
| author_facet | Yusoff, Mahani |
| author_sort | Yusoff, Mahani |
| building | Hamzah Sendut Library |
| collection | Institutional Repository |
| content_provider | Universiti Sains Malaysia |
| content_source | USM Institutional Repository |
| continent | Asia |
| country | Malaysia |
| description | The present work investigates characteristics and properties of in situ nanostructured copper-tungsten carbide composite prepared by mechanical alloying (MA) and powder metallurgy (PM). Elemental powders of Cu (copper), W (tungsten) and graphite (C) were milled in a planetary ball mill using different ball size, milling time and milling speed. Then the product was compacted at different pressures and sintered at different temperatures and times. In situ tungsten carbide phases (WC and W2C) were only present after a combination of MA and sintering. W2C was first to be observed and the formation of WC began with longer milling times and speeds, in accordance to a decreased crystallite size and an increased of internal strain of Cu during MA. W2C was formed as a result of C deficiency whereas WC through transformation from W2C to WC during sintering. |
| format | Thesis |
| id | my.usm.eprints.41987 |
| institution | Universiti Sains Malaysia |
| language | en |
| publishDate | 2012 |
| record_format | eprints |
| spelling | my.usm.eprints.41987 http://eprints.usm.my/41987/ Processing, Microstructure And Properties Of In Situ Copper Reinforced Tungsten Carbide Nanostructured Composite Yusoff, Mahani TN1-997 Mining engineering. Metallurgy The present work investigates characteristics and properties of in situ nanostructured copper-tungsten carbide composite prepared by mechanical alloying (MA) and powder metallurgy (PM). Elemental powders of Cu (copper), W (tungsten) and graphite (C) were milled in a planetary ball mill using different ball size, milling time and milling speed. Then the product was compacted at different pressures and sintered at different temperatures and times. In situ tungsten carbide phases (WC and W2C) were only present after a combination of MA and sintering. W2C was first to be observed and the formation of WC began with longer milling times and speeds, in accordance to a decreased crystallite size and an increased of internal strain of Cu during MA. W2C was formed as a result of C deficiency whereas WC through transformation from W2C to WC during sintering. 2012-05 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/41987/1/MAHANI_BINTI_YUSOFF.pdf Yusoff, Mahani (2012) Processing, Microstructure And Properties Of In Situ Copper Reinforced Tungsten Carbide Nanostructured Composite. PhD thesis, Universiti Sains Malaysia. |
| spellingShingle | TN1-997 Mining engineering. Metallurgy Yusoff, Mahani Processing, Microstructure And Properties Of In Situ Copper Reinforced Tungsten Carbide Nanostructured Composite |
| title | Processing, Microstructure And Properties Of In Situ Copper Reinforced Tungsten Carbide Nanostructured Composite
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| title_full | Processing, Microstructure And Properties Of In Situ Copper Reinforced Tungsten Carbide Nanostructured Composite
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| title_fullStr | Processing, Microstructure And Properties Of In Situ Copper Reinforced Tungsten Carbide Nanostructured Composite
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| title_full_unstemmed | Processing, Microstructure And Properties Of In Situ Copper Reinforced Tungsten Carbide Nanostructured Composite
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| title_short | Processing, Microstructure And Properties Of In Situ Copper Reinforced Tungsten Carbide Nanostructured Composite
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| title_sort | processing, microstructure and properties of in situ copper reinforced tungsten carbide nanostructured composite |
| topic | TN1-997 Mining engineering. Metallurgy |
| url | http://eprints.usm.my/41987/1/MAHANI_BINTI_YUSOFF.pdf http://eprints.usm.my/41987/ |
| url_provider | http://eprints.usm.my/ |