Influence of Co-Doping on the Sintering Map of an Ultra Fine and Ultra Pure Alpha Alumina Powder |
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| Journal | Advances in Science and Technology (Volume 45) |
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| Volume | 11th International Ceramics Congress |
| Edited by | P. VINCENZINI |
| Pages | 55-60 |
| DOI | 10.4028/www.scientific.net/AST.45.55 |
| Citation | Guillaume Bernard-Granger et al., 2006, Advances in Science and Technology, 45, 55 |
| Online since | October, 2006 |
| Authors | Guillaume Bernard-Granger, Christian Guizard |
| Keywords | Aluminium, Microstructure, Sintering |
| Abstract | The sintering map of an ultra fine and ultra pure α-alumina powder, doped with MO and DO2 (M for mono-valence cations, D for bi-valence cations), has been built from isothermal sintering experiments. It has been compared with the one obtained in a previous study with the same un-doped α-alumina raw powder. It seems that a transient liquid phase appears above a critical temperature in the co-doped material during sintering. It is proposed that this transient liquid phase is promoting densification and minimizing grain growth, as confirmed by transmission electron microscopy (TEM). |
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