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http://dx.doi.org/10.4191/KCERS.2005.42.6.417

Effect on Mechanical Properties of 3Y-TZP; (II) Addition of Alumina  

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. 417-424 More about this Journal
Abstract
Although a lot of studies in fracture toughness of Y-TZP ceramics for structural applications have been done, it remains an important challenge to be able to improve fracture toughness of Y-TZP ceramics. In this research, milling method adding monoclinic zirconia and $Al_2O_3$ to 3Y-TZP was introduced to improve the fracture toughness of 3Y-TZP. Experimental results showed that addition of small amount of $Al_2O_3$ causes to make lots of oxygen vacancies (VO) by substituting $Al^{3+}$ for $Zr^{4+}$. It is believed that the produced vacancies provides useful routes far mass transfer. Y-TZP ceramics having higher microhardness and better fracture toughness was fabricated by sintering at $1400^{\circ}C$.
Keywords
3Y-TZP; Milling method; Fracture toughness;
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