Mechanical Properties and Microstructure of Partially Sintered Zirconia Ceramics
| Autor: | Xiao Na Li, Xin Yi Zhao, Cheng Xie, Zhao Hui Chen, Yi Min Zhao, Zhong Yi Wang, Jin Wu Chen, Shi Bao Li, Li Hui Tang |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Mechanical Engineering medicine.medical_treatment Machinability Sintering Microstructure Fracture toughness Flexural strength Mechanics of Materials visual_art visual_art.visual_art_medium medicine General Materials Science Cubic zirconia Ceramic Composite material Dental restoration |
| Zdroj: | Key Engineering Materials. :1252-1254 |
| ISSN: | 1662-9795 |
| DOI: | 10.4028/www.scientific.net/kem.368-372.1252 |
| Popis: | Partially sintered zirconia ceramics (PSZCs) for dental uses were prepared from zirconia nanopowder via isostatic pressing and partially sintering. The open porosities, pore diameters, grain sizes and mechanical properties of the ceramics with different densities were studied. The results show that the pores formed in the PSZCs are all open pores, with a diameter distribution of 60nm~130nm and a grain size distribution of 120~170nm. The machinability becomes worse when the density of PSZC is higher than 75% of the theoretical density, so a ceramic named PSZC-70% with density of 70%TD was selected as the target material. Its bending strength is 168 MPa and fracture toughness is 1.8 MPa·m1/2. A dental restoration framework can be obtained via machining the PSZC-70% on a dental CAD/CAM system. |
| Databáze: | OpenAIRE |
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