The influence of powder particle size on properties of Cu-Al2O3 composites
Inert gas atomized prealloyed copper powder containing 2 wt.% Al (average particle size ≈ 30 μm) and a mixture consisting of copper (average particle sizes ≈ 15 μm and 30 μm) and 4 wt.% of commercial Al2O3 powder particles (average particle size ≈ 0.75 μm) were milled separately in a high-energy pla...
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| Format: | Article |
| Language: | English |
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International Institute for the Science of Sintering, Beograd
2009-01-01
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| Series: | Science of Sintering |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0350-820X/2009/0350-820X0902185R.pdf |
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| author | Rajković V. Božić D. Popović M. Jovanović M.T. |
| author_facet | Rajković V. Božić D. Popović M. Jovanović M.T. |
| author_sort | Rajković V. |
| collection | DOAJ |
| description | Inert gas atomized prealloyed copper powder containing 2 wt.% Al (average particle size ≈ 30 μm) and a mixture consisting of copper (average particle sizes ≈ 15 μm and 30 μm) and 4 wt.% of commercial Al2O3 powder particles (average particle size ≈ 0.75 μm) were milled separately in a high-energy planetary ball mill up to 20 h in air. Milling was performed in order to strengthen the copper matrix by grain size refinement and Al2O3 particles. Milling in air of prealloyed copper powder promoted formation of finely dispersed nano-sized Al2O3 particles by internal oxidation. On the other side, composite powders with commercial micro-sized Al2O3 particles were obtained by mechanical alloying. Following milling, powders were treated in hydrogen at 400 0C for 1h in order to eliminate copper oxides formed on their surface during milling. Hot-pressing (800 0C for 3 h in argon at pressure of 35 MPa) was used for compaction of milled powders. Hot-pressed composite compacts processed from 5 and 20 h milled powders were additionally subjected to high temperature exposure (800°C for 1 and 5h in argon) in order to examine their thermal stability. The results were discussed in terms of the effects of different size of starting powders, the grain size refinement and different size of Al2O3 particles on strengthening, thermal stability and electrical conductivity of copper-based composites. |
| first_indexed | 2024-12-11T05:10:49Z |
| format | Article |
| id | doaj.art-4cb33433e9a94f8bba2c50e3c929b03a |
| institution | Directory Open Access Journal |
| issn | 0350-820X |
| language | English |
| last_indexed | 2024-12-11T05:10:49Z |
| publishDate | 2009-01-01 |
| publisher | International Institute for the Science of Sintering, Beograd |
| record_format | Article |
| series | Science of Sintering |
| spelling | doaj.art-4cb33433e9a94f8bba2c50e3c929b03a2022-12-22T01:19:56ZengInternational Institute for the Science of Sintering, BeogradScience of Sintering0350-820X2009-01-0141218519210.2298/SOS0902185RThe influence of powder particle size on properties of Cu-Al2O3 compositesRajković V.Božić D.Popović M.Jovanović M.T.Inert gas atomized prealloyed copper powder containing 2 wt.% Al (average particle size ≈ 30 μm) and a mixture consisting of copper (average particle sizes ≈ 15 μm and 30 μm) and 4 wt.% of commercial Al2O3 powder particles (average particle size ≈ 0.75 μm) were milled separately in a high-energy planetary ball mill up to 20 h in air. Milling was performed in order to strengthen the copper matrix by grain size refinement and Al2O3 particles. Milling in air of prealloyed copper powder promoted formation of finely dispersed nano-sized Al2O3 particles by internal oxidation. On the other side, composite powders with commercial micro-sized Al2O3 particles were obtained by mechanical alloying. Following milling, powders were treated in hydrogen at 400 0C for 1h in order to eliminate copper oxides formed on their surface during milling. Hot-pressing (800 0C for 3 h in argon at pressure of 35 MPa) was used for compaction of milled powders. Hot-pressed composite compacts processed from 5 and 20 h milled powders were additionally subjected to high temperature exposure (800°C for 1 and 5h in argon) in order to examine their thermal stability. The results were discussed in terms of the effects of different size of starting powders, the grain size refinement and different size of Al2O3 particles on strengthening, thermal stability and electrical conductivity of copper-based composites.http://www.doiserbia.nb.rs/img/doi/0350-820X/2009/0350-820X0902185R.pdfCu-Al2O3 compositeinternal oxidationmechanical alloyingdifferent size of starting powder particleshot-pressingproperties |
| spellingShingle | Rajković V. Božić D. Popović M. Jovanović M.T. The influence of powder particle size on properties of Cu-Al2O3 composites Science of Sintering Cu-Al2O3 composite internal oxidation mechanical alloying different size of starting powder particles hot-pressing properties |
| title | The influence of powder particle size on properties of Cu-Al2O3 composites |
| title_full | The influence of powder particle size on properties of Cu-Al2O3 composites |
| title_fullStr | The influence of powder particle size on properties of Cu-Al2O3 composites |
| title_full_unstemmed | The influence of powder particle size on properties of Cu-Al2O3 composites |
| title_short | The influence of powder particle size on properties of Cu-Al2O3 composites |
| title_sort | influence of powder particle size on properties of cu al2o3 composites |
| topic | Cu-Al2O3 composite internal oxidation mechanical alloying different size of starting powder particles hot-pressing properties |
| url | http://www.doiserbia.nb.rs/img/doi/0350-820X/2009/0350-820X0902185R.pdf |
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