Y2O3 transparent nanoceramics via SPS and ZrO2-doping
Abstrak
The synergistic effect of spark plasma sintering (SPS) and 0–15 mol. % of ZrO₂ doping on the microstructure, mechanical and optical properties of Y2O3 transparent ceramics was investigated. ZrO2-doped Y2O3 were obtained by SPS at 1300–1600 °C. Sintering at 1500 °C leads to defect-free, fully dense material with submicron grain size. The grain size of ceramics decreases from 5.2 to 0.11 µm for Y0Z and Y15Z, respectively, since ZrO2 acts as a grain growth inhibitor. The optimal concentration of ZrO2 to achieve the highest transparency of yttria is 3 mol. % (82.5 % for λ=5 μm). Increasing concentration of Zr4+ ions increases the number of interstitials Oi″, leading to a less efficient elimination of porosity. Vickers microhardness increased from 7.06 to 11.17 GPa with an increase in ZrO2 concentration, while opposite behavior was observed for fracture toughness. The influence of grain size and ZrO2 concentration on elastic modulus, shear modulus and Poisson’s ratio was not revealed.
Topik & Kata Kunci
Penulis (5)
Dariia Chernomorets
Vojtěch Nečina
Pietro Galizia
Roman Yavetskiy
Jan Hostaša
Akses Cepat
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Cek di sumber asli →- Tahun Terbit
- 2025
- Sumber Database
- DOAJ
- DOI
- 10.1016/j.oceram.2025.100784
- Akses
- Open Access ✓