Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지

A Study on the Ceria Stabilized Tetragonal Zirconia Polycrystals(Ce-TZP)(I) : Effect of CeO2 Content on the Mechanical Properties and Fracture Behavior of Ce-TZP

CeO2 안정화 정방정 Zirconia 다결정체(Ce-TZP)에 관한 연구(I) : CeO2 함량에 따른 Ce-TZP의 기계적 성질과 파괴거동의 변화

  • Published : 1989.05.01
Download PDF
⟨ Previous Next ⟩

Abstract

By using commercial zirconia powder CeO2-ZrO2 ceramics containing 8~16mol% CeO2 was made by heat treatment at 1350~155$0^{\circ}C$ for 1~10hr. The minimum amount of CeO2 for obtaining complete tetragonal phase was 12mol%, and in the tetragonal phase region fracture toughness of Ce-TZP was decreased with increasing CeO2 content and the maximum value was obtained when 12mol% CeO2 was added. The bending strength goes through maximum at 14mol% CeO2. Fracture mode of Ce-TZP transformed from intergranular to transgranular fracture with increasing CeO2 content, so the morphology of fracture surface of 16mol% Ce-TZP was wholly transgranular and this tendency was independent on grain size. The crystal structure of the 12mol% Ce-TZP was monoclinic with fringes along the grain boundaries which are lying in the particular plane from the TEM observation. The chemical composition of the sintered body was homogeneous as a whole and some amorphism or air pocket was observed at the triple junction.

Keywords

References

  1. Nature v.258 Ceramic Steel ? R.C. Garvie;R.H. Hannink;R.T. Pascoe
  2. Acta Metall. v.20 On a Martensitic Phase Transformation in ZrO₂-I. Metallographic Evidence G.K. Bansal;A.H. Heuer
  3. J. Am. Ceram. Soc. v.60 no.5-6 Review-Transfor-mation Toughening in Ceramics Martensitic Tramsformation in Crack-Tip Stress Fields A.G. Evans;A.H. Heuer
  4. J. Mater Sci. v.13 Effect of Stress Induced Phase Tramsformation on the Properties of Polycrystaline Zirconia Containing Metastable Tetragonal Phase T.K. Gupta;F.F. Lange;J.H. Bechtold
  5. J. Am. Ceram. Soc. v.70 no.4 Microstrctural Evolution in Ca-PSZ and the Room-Temperature Instability of Tetragonal Zirconia R.M. Dikerson;M.V. Swain;A.H. Heuer
  6. Crack Resistance Curves in Magnesia-Partially-Stabilliz-ed Zirconia v.71 no.6 D.B. Marshall;M.V. Swain
  7. J. Mat. Sci. v.17 Transformation Toughening-Part 3 Experimental Observations in the ZrO₂-Y₂O₃ F.F. Lange
  8. J. Am. Ceram. Soc. v.71 no.2 Transformation Toughening in Lerge-Grain-Size CeO₂Doped ZrO₂Polycrystals T.W. Coyle;W.S. Coblenz;B.A. Bender
  9. Int. J. High Technology Ceramics v.8 I. Nettleship;R. Stevens
  10. J. Am. Ceram. Soc. v.69 no.3 Transformation and Microcrack Toughening as Complementary Processes in ZrO₂Toughened Al₂O₃ M. Ruhle;N. Claussen;A.H. Heuer
  11. J. Mater. Sci. v.20 Strength,Fracture Toughness and Vickers Hardness of CeO₂Stabillzed Tetragonal ZrO₂Polycrystals(Ce-TZP) K. Tsukuma;M. Shimada
  12. J. Am. Ceram. Soc. v.66 no.7 Revised Phase Diagram of the System ZrO₂-CeO₂Below 1400°C E. Tany;M. Yoshimura;S. Somiya
  13. Fracture Toughness Determination by Indentation v.59 no.7-8 A.G. Evans;E.A. Charles
  14. Phase Analysis in Zirconia System v.67 no.6 R.C. Garvie;P.S. Nicholson
  15. Calibration Curve for Quantitative Analysis of the Monoclinic-Tetragonal ZrO₂System by X-ray Diffraction v.67 no.6 H. Traya;M. Yoshimura;S. Somiya
  16. Effect of Pressure on Monoclinic-Tetragonal Zirconia as a Crystal Size Effect v.45 no.12 E.D. Whitney
  17. J. Phy. Chem. v.69 no.4 The Occdruence of Metastable Tetragonal Zirconia as a Crystallite Size Effect R.C. Garvie
  18. The 89 th Annual Meeting of the American Ceramic Society(Basic Science Division,Paper No.126-B-87) Ta₂$O_5$ Alloying Effect on Transformabillity of Y-TZP D.J. Kim;T.Y. Tien
  19. Fracture Mechanics of Ceramics v.8 Strength-Toughness Relationships for Transformation Toughened Ceramics M.V. Swain