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Advances in Materials Science and Engineering
Volume 2013 (2013), Article ID 586123, 5 pages
http://dx.doi.org/10.1155/2013/586123
Research Article

Preparation of CePO4 Modified ZrO2 Ceramics with Different Particle Sizes and Their Mechanical Behaviors

1Department of Geriatric Dentistry, School and Hospital of Stomatology, Peking University, Beijing 100081, China
2State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
3Department of Orthodontics, School and Hospital of Stomatology, Peking University, Beijing 100081, China

Received 16 September 2013; Accepted 23 October 2013

Academic Editor: Yuanhua Lin

Copyright © 2013 Wei Yan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Different particle size 3 mol% Y2O3-stabilized tetragonal zirconia polycrystalline (3Y-TZP) coated with CePO4 was prepared by a coprecipitation method and the effect of zirconia particle-size on its mechanical properties was investigated. The phase composition and microstructure of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), respectively. The machining characteristic of as-prepared samples was calculated to be 0.54 for a zirconia particle size of around 30–50 nm. In this grain size range, the hardness, fracture toughness, and bending strength of the coated sample were found to be 10.72 GPa, 5.76 MPa·m1/2, and 463 MPa. Our results show that the grain size of the zirconia before coating greatly influences the mechanical properties of the coated samples because the different particle sizes result in different fracture styles.