Structure property relations in hot pressed 4.4 mol% calcia stabilized zirconia
4.4 Ca-TZP was hot pressed in the temperature range between 1200 and 1325 °C for 1 h at 60 MPa pressure. The material was characterized with respect to phase composition, mechanical properties and microstructure. The mechanical properties and phase composition of the Ca-TZP react very sensitively to...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-12-01
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| Series: | Open Ceramics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666539524001457 |
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| Summary: | 4.4 Ca-TZP was hot pressed in the temperature range between 1200 and 1325 °C for 1 h at 60 MPa pressure. The material was characterized with respect to phase composition, mechanical properties and microstructure. The mechanical properties and phase composition of the Ca-TZP react very sensitively to changes in sintering temperature and average grain size. Fracture toughness continuously increases with sintering temperature from 5 MPa√m to 8.5 MPa√m while bending strength reaches an optimum of 1160 MPa combined with fracture toughness of 5 MPa√m at 1250 °C sintering temperature. The microstructure of the materials is ultrafine. The onset of monoclinic and cubic phase formation is observed at a sintering temperature of 1300 °C and a grain size of ∼140 nm. Indentation at elevated temperature was applied to suppress crack trapping which would lead to extreme overestimation of indentation toughness values. |
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| ISSN: | 2666-5395 |