코디어라이트-SiC 위스커 복합재료의 기계적 성질과 강화기구

Mechanical Properties and Strengthening Mechanisms of Cordierite-SiC Whisker Ceramic Composites

  • 강대갑 (대한중석광업 주식회사) ;
  • 발행 : 1986.06.01

초록

Flexural strength fracture toughness and strengthening mechanisms of cordierite ceramics reinforced by SiC whiskers up to 40vol% were investigated. The specimens were hot pressed at Ar atmosphere. The porosity increased with the SiC whisker content. Flexural strength and single edge notch beam fracture toughness were measured up to 1,000$^{\circ}C$. Extrapolating to zero porosity the reinforced composites exhibited in-creasings in flexural strength and fracture toughness with the SiC whisker content. The composites were strengthened mainly by load transfer crack impediment and partially by crack deflection mechanisms. Impurities played an important role in determining the mechanical properties of the composites.

키워드

참고문헌

  1. Am. Ceram. Soc. Bull. v.60 no.2 Thermal Expansion of Extruded Cordierite Ceramics I.M. Lachman(et al.)
  2. U.S. Patent 3 885 977 v.3 Anisotropic Cordierite Monolith I.M. Lachman;R.M. Lewis
  3. 85th Annual Meeting of the Am. Ceram. Soc. Preparation and Properties of Mullite/Cordierite Composites B.H. Mussler;M.W. Shafer
  4. Am.Ceram.Soc.Bull. v.64 no.2 Development of SiC-Whisker-Reinforced Ceramics G.C. Wei;P.F. Becher
  5. J. Am. Ceram. Soc. v.67 no.12 Toughening Behavior in SiC-Whisker-Reinforced Alumina P.F. Becher;G.C. Wei
  6. J. Am. Ceram. Soc. v.68 no.6 Creep Deformation of an Alumina Matrix Composite Reinforced with Silicon Carbide Whiskers A.H. Chokshi;J.R. Porter
  7. J. Am. Ceram. Soc. v.67 no.10 Fracture Toughness of a Beta-SiC Whisker J.J. Petrovic;R.B. Roof
  8. Treatise on Materials Science and Technology v.Ⅱ R.W. Rice;R.C. MaC-Crone(ed.)
  9. J. Am. Ceram. Soc. v.36 no.2 Discussion of Ryshkewitch Paper W. Duckworth
  10. J. Am. Ceram. Soc. v.42 no.8 Dependence of Mechanical Strength of Brittle Polycrystalline Specimens on Porosity and Grain Size F.P. Knudsen
  11. Proc. Brit. Ceram. Soc. no.15 The Effect of Porosity and Microstructure on the Mechanical Properties of Ceramics J.E. Baily;N.A. Hill
  12. Ceram. Eng. Sci. Proc. v.2 no.7;8 Mechanics of Toughening in Ceramic Matrix Composites R.W. Rice
  13. Ceram. Eng. Sci. Proc. v.5 no.7;8 The Effect of Ceramic Fiber Coatings on the Room Temperature Mechanical Behavior of Creamic-Fiber Composites R.W. Rice;J.R. Spann;D. Lewis;W. Coblenz
  14. Introduction to Ceramics(2nd Ed.) W.D. Kingery;H.K. Bowen;D.R. Uhlmann
  15. private communication K.L. Weisskopf