Mechanical Properties and Microstructure of Partially Sintered Zirconia Ceramics

Abstract:

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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.

Info:

Periodical:

Key Engineering Materials (Volumes 368-372)

Edited by:

Wei Pan and Jianghong Gong

Pages:

1252-1254

DOI:

10.4028/www.scientific.net/KEM.368-372.1252

Citation:

S. B. Li et al., "Mechanical Properties and Microstructure of Partially Sintered Zirconia Ceramics", Key Engineering Materials, Vols. 368-372, pp. 1252-1254, 2008

Online since:

February 2008

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$35.00

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