About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Manufacturing and Processing of Advanced Ceramic Materials
|
Presentation Title |
Flash Sintering of Ceramics: Towards Homogeneous Components with Improved Mechanical Properties |
Author(s) |
Richard I. Todd, Y. Kubota, Yinsheng Li, Riccardo Torchio, Simone Falco, Piergiorgio Alotto |
On-Site Speaker (Planned) |
Richard I. Todd |
Abstract Scope |
The fact that ceramics can be flash sintered in a few seconds using furnace temperatures significantly lower than those used conventionally is now well established. However, it is also evident that the production of ceramics with full density and uniform microstructure throughout the component is difficult. Perhaps because of this, there are very few reports of measurements of important mechanical properties such as strength in flash sintered ceramics. This presentation first explores the use of thermal management, novel electrode geometries and compositional modification to achieve fully dense and uniform microstructures. The experimental observations concerning specimen geometry and electrode design are investigated using a model incorporating densification and its effect on heat flow and electrical power dissipation. The optimised microstructures and properties of YSZ are reported. It is shown that microstructures not easily accessible by conventional sintering can be produced and that these lead to improved strength and hardness. |