Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of Starting Crystallographic Phase on the Mechanical Properties of Hot-Pressed SiC Ceramics

초기분말의 결정상이 $Al_2O_3$를 소결 조제로한 고온가압 SiC 세라믹스의 기계적 특성에 미치는 영향

  • Published : 1992.03.01
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Abstract

Densification behavior, microstructural evolution, and mechanical properties of hot-pressed specimens using $\beta$-SiC and $\alpha$-SiC powder with Al2O3 additive were studied. Beta-SiC powder was fully densified as 205$0^{\circ}C$, but $\alpha$-SiC powder was at 210$0^{\circ}C$. The maximum flexural strength and the fracture toughness of the specimen hot-pressed using $\beta$-SiC powder were 681 MPa and 6.7 MPa{{{{ SQRT {m } }}, and thosevalues of specimen hot-pressed using $\alpha$-SiC powder were 452 MPa and 4.7 MPa{{{{ SQRT {m } }}, respectively. The strength superiority of specimen hot-pressed using $\beta$-SiC powder was due to the finer grain size, and higher density. The higher toughness of specimen hot-pressed using $\beta$-SiC powder than $\alpha$-SiC powder than $\alpha$-SiC powder was due to the crack deflection mechanism arised from the difference of thermal expansion coefficient between $\alpha$ and $\beta$-SiC phases which were co-existed in the sintered body.

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References

  1. Structural Ceramics The Silicon Cerbide Family of Structural Ceramics M. Srinivasan;J.B. Wachtman Jr.(ed.)
  2. Int. J. Impact Eng v.7 no.3 The Relation Between Ballistic Efficiency and Compressive Strength of Ceramic Tiles M. Rozenberg;Y. Yeshrun
  3. A.D.D Technical Report 상용 파인 세라믹스 특성분석(Ⅰ) 백용기;정동익;최원봉;강을손;김한식
  4. Ceramic Armor Technology Silicon Carbide H.D. Batha;B.R. Micoioli
  5. Report NSWC/DI.TR-3342. Dahlgren. Virginia The Design and Fabrication of a Ceramic-lined Gun Barrel Insert S.G. Fishman;C.B. Palmer
  6. Report ARLCD-CR-80058 Feasibility of Ceramic Lined Gun Tube R.A. Giles;E. Bunning;D. Claxton;J.A. Lannon
  7. AFWAL Contract Report Property Screening and Evaluation of Ceramic Turbine Materials D.C. Larsen;J.W. Adams
  8. Ceram. Eng. Sci. Proc v.9 no.9;10 Investigation of Selected Silicon Nitride and Silicon Carbide Ceramics N. Hecht;D. McCullum(et al.)
  9. Silicon Carbide Ceramics Sintering Aids and Thermal Conductivity of Polycrystalline SiC T. Sakai;N. Hirosaki;T. Akiwa;O. Motomiya(ed.);Y. Inomata(ed.)
  10. J. Am. Ceram. Soc v.39 no.11 Pressure-Sintered Silicon Carbide R.A. Alliegro;L.B. Coffin;J.R. Tinklepaugh
  11. Int. J. Fracture v.16 Fracture Toughness Calibration from Maximum Load in Fourpoint Bend Test of Chevron Notched Specimens D. Munz;J.L. Shannon;R.T. Bubsey
  12. J. Am. Ceram. Soc v.63 no.5;6 Comparison of High Temperature Fracture Toughness of Hot-Pressed Si₃N₄with Straight-through and Chevron Notches D. Munz;G. Himsolt;J. Eschweiler
  13. J. Mater. Sci. v.14 The Quantitative Calculation of SiC Polytypes from Measurement of X-ray Diffraction Peak Intensities J. Ruska;L.J. Gauckler;J. Lorenz;H.C. Rexer
  14. Special Ceramics 6 The Role of Boron and Carbon in the Sintering of SiC S. Prochazka;P. Popper(ed.)
  15. Sliicon Carbide Ceramics Pressurless Sintering of Silicon Carbide with Addition of Aluminum Oxide K. Suzuki;O. Motomiya(ed.);Y Inomata(ed.)
  16. J. Am. Ceram. Soc. v.74 no.2 Thermochemical Amalysis of the Silicon Carbide-Alumma Reaction with Reference to Liquid Phase Sintering of Silicon Carbide A.K. Misra
  17. Ceramic Transactions v.2 Enhanced Formation of 4H Polytype on Silicone Cabide Mterials S.S. Shinozaki;J Hangas;J.D. Cawley;C.E. Semler(ed.)
  18. J. Am. Ceram. Soc. v.71 no.1 Phase Transformation and Thermal Conductivity of Hot-Pressed Silicon Carbide Containing Alumina and Carbon T. Sakai;T. Aikawa
  19. J. Am. Ceram. Soc. v.61 no.9;10 β→α Transformation in Polycrystallinc SiC;Ⅰ, Microstructural Aspects A.H. Heuer;G.A. Fryburh;L.U. Ogbuji;T.E. Michell
  20. J. Am. Ceram. Soc. v.61 no.9;10 β→α Transformation in Polycrystalline SiC:Ⅱ, Interfacial Energetics T.E. Mitchell;S.U. Ogbuji;A.H. Heuer
  21. J. Am. Ceram. Soc. v.42 no.2 The β→α Transformation in Polycrystalline SiC:Ⅲ, The Thickening of a Plates L.U. Ogbuji;T.E. Mitchell;A.H. Heuer
  22. J. Am. Ceram. Soc. v.64 no.2 The β→α Transformation in Polycystalline SiC: Ⅳ, A Comparison of Conventionally Sintered, Hot-Pressed, Reaction-Sintered and Chemically Vapor-Deposited Samples L.U. Ogbuji;T.E. Mitchell;A.H. Heuer;S. Shinozaki
  23. Proc. Br. Cerm. Soc. v.20 Strength/Grain Size Effect in Ceramics R.W. Rice
  24. Acta Matall v.31 no.4 Crack Deflection Process-Ⅰ. Theory K.T. Faber;A.G. Evans
  25. Acta Matall v.31 no.4 Crack Deflection Process-Ⅱ. Experiment K.T. Faber;A.G. Evans
  26. Ceramic Transaction v.2 Thermal Expansion and Elastic Anisotropies of SiC as Related to Polytype Structure Z. Li;R.C. Bradt;J.D. Cawley(ed.);C.E. Semler(ed.)