About this Abstract |
Meeting |
MS&T23: Materials Science & Technology
|
Symposium
|
Engineering Ceramics: Microstructure-Property-Performance Relations and Applications
|
Presentation Title |
Fabrication of High Strength Alumina with Residual Stress by EPD in Strong Magnetic Field |
Author(s) |
Tohru S. Suzuki, Atsushi Nagase, Hajime Kiyono, Tetsuo Uchikoshi |
On-Site Speaker (Planned) |
Tohru S. Suzuki |
Abstract Scope |
Control of crystallographic orientation in ceramics is effective way for improving their properties, and layered structure is also one of the candidates of microstructure for the design of structural ceramics. The layered structure can be controlled by electrophoretic deposition (EPD) combined with magnetic alignment to fabricate the multilayered composites with alternative crystallographic orientation layer by layer.
In this study, we report that multilayered alumina was densified by Spark plasma sintering (SPS) and very high strength alumina with transparency. The residual stress was introduced to the layers due to the difference of the thermal expansion.
The coefficient of the thermal expansion of the c-axis is larger than that of the a-axis in alumina. Therefore, the compression residual stress was generated in the layer with c-axis parallel to the layer surface. The bending strength was more than 1GPa the specimen with the compression residual stress in the surface layer. |