| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Spark Plasma Sintering of Stabilized Zirconia: Strategies to Design Ceramics with Tailored Properties |
| Author(s) |
Claude Estournes, Andréas Flaureau, Amaud Fregeac, Mélanie Rousselle , Thomas Herisson de Beauvoir, Geoffoy Chevallier , Alicia Weible, Florence Ansart, Guillaume Fradet, Serge Selezneff , Catherine Elissalde, Fabrice Mauvy |
| On-Site Speaker (Planned) |
Claude Estournes |
| Abstract Scope |
Ceramics exhibit interesting mechanical properties (hardness, stiffness, wear resistance...) but are penalized by their low toughness (KIc). However, zirconia based ceramics (ZrO2) described as "ceramic steel" because, while retaining the usual properties of ceramics, exhibit exceptionally high toughness which paved the way for many applications. SPS allows to densify materials, at lower temperature and shortest time, leading to nanoscale microstructures that are hardly achieved by others methods. Few years ago, we have densified 200 nm grain size yttria stabilized zirconia (3Y-ZrO2) ceramics exhibiting excellent mechanical properties (f = 692 MPa and KIc = 10.3 MPa.m1/2).
The presentation will be focused on:
– A study of the sintering mechanisms (densification and grain growth) of two stabilized zirconia powders (3- and 8Y-ZrO2).
– In- and ex-situ impedance spectroscopy measurements on 3- and 8Y-ZrO2, the results are discussed to assess any influence of the sintering parameters and/or specific effects of the SPS process on their electrical conductivity.
– The effect of the nature, size and morphology of the grains of YSZ starting powders and SPS conditions on the microstructure of the ceramics obtained and how their mechanical properties are impacted. |
| Proceedings Inclusion? |
Planned: |