Influence of Co-Doping on the Sintering Map of an Ultra Fine and Ultra Pure Alpha Alumina Powder

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).

• Periodical: Advances in Science and Technology (Volume 45)
• Pages: 55-60
• DOI: https://doi.org/10.4028/www.scientific.net/AST.45.55
• Online since: October 2006
• Authors: Guillaume Bernard-Granger, Christian Guizard
• Keywords: Aluminum (Al), Microstructure, Sintering

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