The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Properties of Electrical Discharge Machinable $SiC-TiB_2$ Composites

  • Kim, Young-Wook (Division of Ceramics, Korea Institute of Science and Technology, Seoul) ;
  • Park, Heon-Jin (Division of Ceramics, Korea Institute of Science and Technology) ;
  • Lee, June-Gunn (Division of Ceramics, Korea Institute of Science and Technology) ;
  • Lee, Soo W. (Dept. of Mater. Eng., Sun-Moon Univ) ;
  • Chung, Soon-Kil (World-Peace Institute of Technology)
  • Published : 1995.09.01
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Abstract

Electrical discharge machinable $SiC-TiB_2$ composites were fabricated by hot-pressing. Their mechanical and electrical properties were determined as a function of $TiB_2$ content. The addition of $TiB_2$ to SiC matrix increased the strength and toughness and decreased electrical resistivity. The flexural strength and fracture toughness of SiC-40 vol% $TiB_2$ composited were approximately 50% higher than those of monolithic SiC ceramics. Microstructural analysis showed that the toughening was mainly due to the crack deflection, with some possible contribution from crack branching or microcracking.

Keywords

References

  1. J. Mater. Sci. v.27 Effect of Polycarbosilane Addition on Mechanical Propeties of Hot-Pressed Silicon Carbide Y.W.Kim;J.G.Lee
  2. Acta Metall. Mater v.42 no.1 Mechanical Properties of β-SiC Pressureless Sintered with Al₂O₃Additions M.A.Mulla;V.D.Krstic
  3. 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
  4. aacepted for publication in J. Am. Ceram. Soc. Grain Growth and Fracture Toughness of Fine-Grained SiC Ceramics Y.W.Kim;M.Mitomo;H.Hirotsuru
  5. J. Am. Ceram. Soc. v.77 no.2 In Situ-Toughened Silicon Carbide N.P.Padture
  6. J. Am. Ceram. Soc. v.77 no.6 Effects of α-SiC versus β-SiC Starting Powders on Microstructure and Fracture Toughness of SiC Sintered with Al₂O₃-Y₂O₃Additives S.K.Lee;C.H.Kim
  7. J. Am. Ceram. Soc. v.75 no.9 Sintering of in-Situ Synthesized SiC-TiB₂Composites with Improved Fracture Toughness Y.Ohya;M.J.Hoffmann;G.Petzow
  8. Am. Ceram. Soc. Bull. v.66 no.2 Mechanical Properties and Oxidation Behavior of a Hot-Pressed SiC-15 vol% TiB₂Composite M.A.Janney
  9. Adv. Ceram. Mater. v.3 no.4 EDM Sinker Cutting of a Ceramic Particulate Composite, SiC-TiB₂ M.Ramulu
  10. Am. Ceram. Soc. Bull. v.65 no.2 Microstructural Development and Mechanical Properties of SiC and SiC-TiC Composites M.A.Janney
  11. J. Ceram. Soc. Jpn. v.100 no.4 High-Temperature Toughening Mechanism in SiC/TiC Composites B.W.Lin;T.Yano;T.Iseki
  12. Am. Ceram. Soc. Bull. v.66 no.2 Microstructure and Material Properties of SiC-TiB₂Particulate Composites C.H.McMurtry;W.D.G.Boecker;S.G.Seshadri;J.S.Zanghi;J.E.Garnier
  13. Materials Science and Engineering Handbook(2nd Ed.) J.F.Shackelford
  14. J. Mater. Sci. v.17 Grain-Boundary Segregation in Al-doped SiC Y.Tajima;W.D.Kingery
  15. J. Am. Ceram. Soc. v.70 no.8 Effect of Oxygen Contamination on Densification of TiB₂ S.Baik;P.F.Becher
  16. J. Am. Ceram. Soc. v.67 no.8 Improvements in Mechanical Properties in SiC by the Addition of TiC Particles G.C.Wei;P.F.Becher
  17. 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
  18. Prog. Mater. Sci. v.21 no.3-4 Structural Ceramics A.G.Evans;T.G.Landon
  19. Structural Ceramics, Treatise on Materials Science and Technology v.29 J.B.Watchman,Jr
  20. Acta. Metall. v.31 no.4 Crack Deflection Processes-Ⅰ. Theory K.T.Faber;A.G.Evans
  21. Powder Metall. Int. v.8 Application of Basic Research to the Development of Hard Metals O.R$\"u$diger;H.E.Exner