Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect on Mechanical Properties of 3Y-TZP; (I) Addition of Monoclinic Zirconia

3Y-TZP의 기계적 물성에 미치는 영향: (I) 단사정지르코니아의 첨가

  • 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)
  • 양성구 (경남대학교 대학원 재료공학과, 경남대학교 공동기기센터) ;
  • 배경만 (경남대학교 대학원 재료공학과) ;
  • 조범래 (계명대학교 신소재공학과) ;
  • 강종봉 (경남대학교 신소재공학부)
  • Published : 2005.06.01
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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

References

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