Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Mechanical Properties of $Al_2O_3-ZrO_2$ Ceramics Prepared by Co-precipitation Method

공침법으로 제조한 $Al_2O_3-ZrO_2$ 계의 세라믹스의 기계적 성질

  • 이홍림 (연세대학교 공과대학 요업공학과) ;
  • 홍기곤 (연세대학교 공과대학 요업공학과) ;
  • 정형진 (한국과학기술원 무기재료연구실)
  • Published : 1986.03.01
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Abstract

$Al_2O_3-ZrO_2$ ceramics was obtained by the co-precipitation method using $Al_2(SO_4)_2$.$18H_2O$ and $ZrOCl_2$.$8H_2O$ as starting materials $MgCl_2$.$6H_2O$ as a sintering aid and NH4OH as a hydrolyzing agent. The coprecipitate from the above raw materials was calcined at 125$0^{\circ}C$ for 1h and again sintered at 1$650^{\circ}C$ for 2h before measurements of strength hardness and fracture toughness. MgO addition was found to increase mechanical properties of the $Al_2O_3-ZrO_2$ system. The strength and frac-ture toughness of $Al_2O_3-ZrO_2$ ceramics were considered to be increased by stress-induced phase tranforma-tion of $ZrO_2$.

Keywords

References

  1. J. Am. Ceram. Soc. v.49 no.9 Diffusionless Phase Transformations in Zirconia and Hafnia G.M. Wolten
  2. Advanced in Ceramics v.3 Alloy Design in Partially Stabillized Zirconia;Science and Technology of Zirconia A.H. Heuer
  3. Nature v.258 Ceram Steel R.C. Garvie(et al.)
  4. J. Am. Ceram. Soc. v.62 no.5-6 Microstructural Development in MgO-PSZ D.L. Poter(et al.)
  5. J. Mat. Sci. v.13 Effect of Stress Induced Phase Transformation on the Properties of Poly-crystalline Zirconia Containing Matastable Tetragonal Phase T.K. Gupta(et al.)
  6. J. Am. Ceram. Soc. v.59 no.1-2 Fracture Toughness of Al₂O₃with an Unstabilized ZrO₂Dispersed Phase Nils Claussen
  7. J. Am. Ceram. Soc. v.59 no.9-10 Toughness of Ceramic Composites by Oriented Nucleation of Microcracks Nils Claussen;Jorg Steeb
  8. Ceram. Bill. v.56 no.6 Effect of Induced Microcracking on the Fracture Toughness of Ceramics Nils Claussen;Jorg Steeb;Reiner F. Pabst
  9. Advanced in Ceramics v.3 Design of Transformation Toughened Ceramics;Science and Technology of Zirconia N. Claussen(et al.)
  10. J. Am. Ceram. Soc. v.55 no.6 Phase Analysis in Zirconia Systems Ronald C. Garvie;Patrick S. Nicholson
  11. J. Am. Ceram. Soc. v.59 no.7-8 Fracture Toughness Determination by Indentation A.G. Evans;E.A. Charles
  12. J. Am. Ceram. Soc. v.67 no.3 Hindrance of Grain Growth in Al₂O₃by ZrO₂Inclusion F.F. Lange(et al.)
  13. J. Am. Ceram. Soc. v.c66-67 Influence of MgO Additions on the Microstructure and Mechanical Properties of Al₂O₃-ZrO₂Composites Tomaz Kosmac;Jay S. Wallace;Nils Claussen
  14. Introduction to Ceramics Grain Growth, Sintering and Vitrification W.D. Kingery;H.K. Bowen;D.R. Uhlmann
  15. Advance in Ceramics v.12 Ripenning of Inter -and Intragranular ZrO₂Particles in ZrO₂-Toughened Al₂O₃;Science and Technology of Zirconia B.W. Kibbel;A.H. Heuer
  16. J. Am. Ceram. Soc. v.56 no.4 Effect of Anions on Hot-Pressing of MgO M.H. Leipold;C.M. Kapadia
  17. Ceram. Bull. v.57 no.8 Analysis of Cl-ions Laundered from Submicron Zirconia Powders C.E. Scott;J.S. Reed
  18. Ceram. Bull. v.58 no.6 Effect of Laundering and milling on the Sintering Behavior of Stabilized ZrO₂Powders C.E. Scott;J.S. Reed
  19. Quantitative Stereology The Spektor(Chord) Analysis Ervin E. Underwood
  20. Alumina as a Ceramic Material Sintering Walter H. Citzen