The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Effect of Additive Amount on Microstructure and Fracture Toughness of SiC-TiC Composites

  • Min-Jin Kim (Department of Materials Science and Engineering, The University of Seoul) ;
  • Young-Wook Kim (Department of Materials Science and Engineering, The University of Seoul) ;
  • Wonjoong Kim (Department of Materials Science and Engineering, The University of Seoul) ;
  • Hun-Jin Lim (Agency for Technology and Standard) ;
  • Duk-Ho Cho (Agency for Technology and Standard)
  • Published : 2000.06.01
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Abstract

Powder mixtures of $\beta$-SiC-TiC in a weight ratio of 2:1 containing 5-20 wt% additives ($Al_2O_3$-$Y_2O_3$) were liquid-phase sintered at $1830^{\circ}C$ for 1h by hot-pressing and subsequently annealed at $1950^{\circ}C$ for 6h to enhance grain growth. The annealed specimens revealed a microstructure of \"in situ-toughened composite\" as a result of the $\beta$longrightarrow$\alpha$ phase transformation of SiC during annealing. The increase of the content of additives accelerated the growth of elongated $\alpha$-SiC grains with higher aspect ratio and improved fracture toughness. The fracture toughness of SiC-TiC composite containing 20 wt% additive was 6.2 MPa.$m^{1/2}$.2}$.

Keywords

References

  1. Am.Ceram.Soc.Bull. v.65 no.2 Microstructural Development and Mechanical Properties of SiC and of SiC-TiC Composites M.A.Janney
  2. J.Am.Ceram.Soc. v.75 no.9 Sintering of InSitu Synthesized SiC-TiB₂Composites with Improved Fracture Toughness Y.Ohya;M.J.Hoffmann;G.Petzow
  3. J.Am.Ceram.Soc. v.78 no.5 Polytypes,Grain Growth and Fracture Toughness of Metal Boride Particulate SiC Composites H.Tanaka;N.Iyi
  4. J.Am.Ceram.Soc. v.67 no.8 Improvements in Mechanical Properties in SiC by the Additon of TiC Particles G.C.Wei;P.F.Becher
  5. Mater.Sci.Eng. v.A109 Studies on the Strengthening of Silicon Carbide-based Multiphase Ceramics I:The SiC-TiC System D.L.Jiang;J.H.Wang;Y.L.Li;L.T.Ma
  6. J.Mater.Sci. v.31 SiC-TiC and SiC-TiB₂Composites Densified by Liquid-Phase Sintering K.S.Cho;Y.W.Kim;H.J.Choi;J.G.Lee
  7. Ceram.Int. v.24 Effects of Additive Amount on Microstructure and Fracture Toughness of SiC-TiB₂Composites K.S.Cho;H.J.Choi;J.G.Lee;Y.W.Kim
  8. Acta Mater v.44 no.10 Debonding of Interfaces Between β-Silicon Nitride Whiskers and Si-Al-Y Oxynitride Glasses P.F.Becher;E.Y.Sun;C.-H.Hsueh;K.B.Alexander;S.L.Hwang;S.B.Waters;C.G.Westmoreland
  9. J.Am.Ceram.Soc. v.82 no.2 Microstructure and Mechanical Properties of α-Silicon Carbide Sintered with Yttrium-Aluminum Garnet and Silica J.Y.Kim;Y.W.Kim;M.Mitomo;G.D.Zhan;J.G.Lee
  10. Mater.Res.Bull. v.29 no.6 Silicon Carbide-Titanium Carbide Nanocomposites: Microstructural Investigation F.Gourbilleau;H.Maupas;R.Hillel;J.L.Chermant
  11. Mater.Res.Bull. v.29 no.8 The Effect of Nanoscale Microstructures on the Mechanical Behavior of Silicon-Carbon-Titanium-Carbon Composites H.Maupas;J.L.Chermand;R.Hillel
  12. J.Am.Ceram.Soc. v.79 no.12 Effect of Cr₃C₂ Addition on the Sintering of SiC-TiC Composites K.W.Chae;K.Niihara;D.Y.Kim
  13. J.Am.Ceram.Soc. v.79 no.6 In Situ-Toughened Silicon Carbide-Titanium Carbide Composites K.S.Cho;Y.W.Kim;H.J.Choi;J.G.Lee
  14. J.Mater.Sci.Lett. v.17 Microstructure and Fracture Toughness of In-Situ Toughened SiC-TiC Composites K.S.Cho;H.J.Choi;J.G.Lee;Y.W.Kim
  15. J.Am.Ceram.Soc. v.77 no.2 In Situ-Toughened Silicon Carbide N.P.Padture
  16. J.Am.Ceram.Soc. v.80 no.1 Microstructural Development of Silicon Carbide Containing Large Seed Grains Y.W.Kim;M.Mitomo;H.Hirotsuru
  17. J.Am.Ceram.Soc. v.814 no.12 Effect of Initial α-Phase Comtent on Microstructure and Mechanical Properties of Sintered Silicon Carbide Y.W.Kim;M.Mitomo;H.Emoto;J.G.Lee
  18. J.Am.Ceram.Soc. v.64 no.9 A Critical Evaluation of Indentation Techniques for Measuring Fracture Toughness:I,Direct Crack Measurements G.R.Anstis;P.Chantikul;B.R.Lawn;D.B.Marshall
  19. J.Ceram.Soc.Jpn. v.103 no.3 Influence of Powder Characteristics on Liquid Phase Sintering of Silicon Carbide Y.W.Kim;H.Tanaka;M.Mitomo;S.Otani
  20. J.Am.Ceram.Soc. v.65 no.2 Mechanical Properties of Polycryatalline TiC G.Das;K.S.Mazdiyasni;H.A.Lipisitt
  21. J.Mater.Sci. Effects of Additive Amount on Microstructure and Mechanical Properties of Silicon Carbide-Silicon Nitride Composites Y.I.Lee;Y.W.Kim;H.J.Choi;J.G.Lee