| Autor: |
Hassanzadeh-Tabrizi S.A., Taheri-Nassaj E. |
| Jazyk: |
angličtina |
| Rok vydání: |
2010 |
| Předmět: |
|
| Zdroj: |
Science of Sintering, Vol 42, Iss 3, Pp 321-328 (2010) |
| Druh dokumentu: |
article |
| ISSN: |
0350-820X |
| DOI: |
10.2298/SOS1003321H |
| Popis: |
In the present study, the effect of cobalt oxide on the densification of Al2O3-YAG composite nanopowder was investigated. An amorphous nanopowder was synthesized and crystallized to Al2O3-YAG after heat-treatment via a solid-state reaction. The average particle size of heat-treated powder at 800°C was about 80 nm. Cobalt oxide improved the sintering rate of Al2O3-YAG composite nanopowders and promoted grain boundary mobility. Cobalt oxide doping increased the ratio of densification/grain growth rate. The activation energy for grain growth decreased from 590 to 485 kJ/mol by adding cobalt oxide to the composite nanopowder. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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