Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Control of Microstructures and Properties of Composites of the Al2O3/ZrO2-ZrO2-Spinel System: I. Preparation and Sintering Behavior of Al2O3-ZrO2 Composite Powders

Al2O3/ZrO2-Spinel계 복합체의 미세구조 및 물성제어: I. Al2O3-ZrO2 복합분체의 제조 및 소결특성

  • 현상훈 (연세대학교 세라믹공학과) ;
  • 송원선 (연세대학교 세라믹공학과)
  • Published : 1992.10.01
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Abstract

Al2O3-20 wt% ZrO2 composite powders to be used as the starting materials of the Al2O3/ZrO2-Spinel composite system were prepared by the use of the emulsion-hot kerosene drying method. The crystalline phase of ZrO2 in the synthesized Al2O3-ZrO2 composite powders was 100% tetragonal but the small amount of t-ZrO2 was transformed into m-ZrO2 after crushing. The hardness, fracture toughness, and flexural strength of the composite, which was sintered at 1650$^{\circ}C$ for 4 hrs after calcining at 1100$^{\circ}C$ for 2 hrs and had the relative density of 99%, were 15.7 GPa, 4.97 MN/m3/2, and 390 MPa, respectively. The fracture form in the sintered composites was found to be the intergranular fracture.

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References

  1. J. Am Ceram. Soc. v.59 no.1;2 Fracture Toughness of Al₂O₃ with an Unstabilized ZrO₂ Dispersed Phase N. Claussen
  2. J. Am. Ceram. Soc. v.70 no.3 Strengthening of Oxide Ceramics by Transformation-Induced Stresses A.V. Virkar;J.L. Huang;R.A. Cutler
  3. Treatise on Mater. Sci and Technology v.29 Transformation Toughcned Ceramics for Structural Applications W.R. Cannon
  4. Mater Sci. Eng. v.71 Strengthening Strategies for ZrO₂-Toughened Ceramics at High Temperatures N. Claussen
  5. J. Mater. Sci. v.24 Review:Zirconia-Toughened Alumina(ZTA) Ceramics J. Wang;R. Stevens
  6. J. Am. Ceram. Soc. v.69 no.3 Transformation and Microcrack Toughening as Complementary Processes in ZrO₂-Toughened Al₂O₃ M. Ruhle;N. Claussen
  7. Mater. Sci. and Eng v.71 The Role of Tetragonal and Monoclinic ZrO₂ Particles in the Fracture Toughness of Al₂O₃-ZrO₂ Composites T. Kosmac;M.V. Swain;N. Claussen
  8. Ceramic Powder Use of Emulsion in the Preparation of Ceramic Powders P.Reynen;H. Bastius;M. Fiedler;P. Vincenzini(ed.);Elsevier(ed.);Amsterdam(ed.)
  9. J. Korean. Ceramic Society. v.25 no.3 Preparation of Al₂O₃-ZrO₂ Composite Powders by the Use of Emulsions: II. Emulsion Hot-Kerosene Method S.H. Hyun;J.G. Paik
  10. J. Appl. Phys. v.32 no.5 Sintering Crystalline Solids, II R.L. Coble
  11. Nature v.258 no.5537 Ceramic Steel? R.C. Garvie;R.H. Hannink;R.T. Pascoe
  12. J. Am. Ceram. Soc. v.55 no.6 Phase Analysis in Zirconia Systems R.C. Garvie;P.S. Nicholson
  13. J. Am. Ceram. Soc. v.59 no.7;8 Fracture Touhness Determination by Indentation A.G. Evans;E.A. Charles
  14. Ceram. Bull. v.56 no.6 Effect of Induced Microcracking on the Fracture Toughness of Ceramics N. Claussen;J. Steeb;R.F. Barst
  15. J. Mater. Sci. v.17 no.1 Transformation Toughening I-V F.F. Lange
  16. Fracture Mechanics of Ceramics v.6 A Statistical Analysis of Crack Deflection as a Toughening Mechanism in Ceramic Materials K.T. Faber;A.G. Evans;M.D. Drory;R.C. Bradl(et al)