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http://dx.doi.org/10.4191/KCERS.2005.42.6.411

Effect on Mechanical Properties of 3Y-TZP; (I) Addition of Monoclinic Zirconia  

Yang, Seong-Koo (Department of Materials Science and Engineering, Kyungnam University, The Center for Instrumental Analysis in Kyungnam University)
Bae, Kyung-Man (Department of Materials Science and Engineering, Kyungnam University)
Cho, Bum-Rae (Department of Advanced Materials Engineering, Keimyung University)
Kang, Jong-Bong (Division of Advanced Materials Engineering, Kyungnam University)
Publication Information
Journal of the Korean Ceramic Society / v.42, no.6, 2005 , pp. 411-416 More about this Journal
Abstract
Y-TZP(Yttria-stabilized Tetragonal Zirconia Polycrystal) ceramics are of great interest as engineering and structural materials due to their excellent mechanical properties arising from transformation toughening, it is also reported that the 3Y-TZP($3 mol\%$ Yttria-stabilized Tetragonal Zirconia Polycrystal) has the best mechanical properties in Y-TZP ceramics. But to use widely for engineering and structural materials, it remains an important challenge to be able to improve its fracture toughness. In order to produce the 3Y- TZP ceramics showing much better mechanical properties, milling method adding monoclinic zirconia to 3Y-TZP was adopted and the resultant mechanical properties containing apparent density and fracture toughness were measured by using proper techniques. Experimental results showed that the 3Y-TZP specimen containing $33 wt\%$ of monoclinic zirconia, which was sintered at $1450^{\circ}C$, has the highest fracture toughness value of $11.38 MPa{\cdot}m^{1/2}$ which is three times higher than that of normal 3Y-TZP ceramics.
Keywords
3Y-TZP; Milling method; Fracture toughness; Transformation toughening;
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