Speaker
Description
This study reports the successful fabrication of bulk nanocrystalline 3 mol% yttria-stabilized zirconia (3YSZ) from 60 nm powder, achieving a uniform grain size of 65 ± 20 nm via high-pressure-assisted spark plasma sintering (HP-SPS) at 1200 °C under 150 MPa. The densification mechanisms involve grain rotation, rearrangement, and plastic deformation driven by the synergistic effects of high pressure and electric fields. Additionally, this combination effectively inhibits grain coarsening. The resulting ceramics exhibit a microstructure characterized by low-energy, flat, and ultra-thin grain boundary as well as coincidence site lattice (CSL, Σ = 7), conferring exceptional mechanical properties, notably a flexural strength of 1703 ± 95 MPa and a Vickers hardness of 15.75 ± 0.79 GPa. This work significantly advances processing strategies for manufacturing dense nanocrystalline ceramics with precisely controlled microstructures.
| Professional Status of the Speaker | Senior Scientist |
|---|---|
| Invitation letter for visa | Yes |
| Interest in submitting a paper in a special issue of | Journal of the European Ceramic Society (Elsevier) |
