Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
권호 표지

Sintering behavior and mechanical properties of the $Al_2O_3-SiC$ nano-com-posite using a spark plasma sintering technique

$Al_2O_3-SiC$ 나노복합체의 방전 플라즈마 소결 특성 및 기계적 물성

  • 채재홍 (요업기술원 연구기획팀) ;
  • 김경훈 (한양대학교, CPRC, 세라믹공학과) ;
  • 심광보 (한양대학교, CPRC, 세라믹공학과)
  • Published : 2003.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

A spark plasma sintering technique has been used for the fabrication of $Al_2O_3$-SiC nanocomposites at the low temperature of $1100^{\circ}C$∼$1500^{\circ}C$. The sintered $Al_2O_3$-SiC composites shows very homogeneous microstructure without any particular abnormal grain growth, indicating that the addition of nano-sized SiC particles is very effective to control grain growth and to induce the residual stress in the $Al_2O_3$ matrix, resulting in the intragranular fracture. These SiC particles are present in the grain boundaries and also intragrain, depending on the sintering condition, and improve remarkably the mechanical properties of $Al_2O_3$-SiC composite through the mechanisms of strengthening and toughening induced by crack diffraction and crack bridging.

방전 플라즈마 소결법을 적용하여 $Al_2O_3$-SiC 나노 복합체를 150$0^{\circ}C$ 이하의 온도에서 완전치밀화를 이루었다. 제조된 $Al_2O_3$-SiC 복합체는 이상 결정립 성장 없이 매우 균질한 미세구조를 형성하고 있는데, 첨가된 SiC 입자는 주로 결정립 내 및 결정립계에 존재하면서 $Al_2O_3$기지상에서 결정립 성장을 억제하는데 매우 유호하였음을 확인 할 수 있다. 한편, SiC 입자의 첨가는 크랙 회절 및 브릿징 등에 의해서 유도된 재료 강도 및 인성 강화 기구에 의해서 $Al_2O_3$-SiC 복합체의 기계적 물성을 크게 향상시켰다.

Keywords

References

  1. Am. Ceram. Soc. Bull v.56 no.6 Effect of induced microcracking on the fracture toughness of ceramics N.Claussen;J.Steeb;R.F.Pabst
  2. Fracture mechamics of ceramics v.7 K.Niihara;A.Nakahira;T.Uchiyama;T.Hirai;R.C.Bradt(ed.);A.G.Evans(ed.);D.H.Hasselman(ed.);F.F.Lange(ed.)
  3. J. Ceram. Soc. Jpn. v.99 no.10 New design concept of structural ceramics K.Niihara
  4. Fracture mechanics of ceramics v.7 A.Nakahira;K.Niihara;R.C.Bradt(ed.);A.G.Evans(ed.);D.H.Hasselman(ed.);F.F.Lange(ed.)
  5. Nanostructur. Mater v.5 no.7-8 Microstructure and thermal conductivity of Si₃N₄/SiC nanocomposites fabricated from amorphous Si-C-N precursor powders T.Hirano;K.Izaki;K.Niihara https://doi.org/10.1016/0965-9773(95)00287-O
  6. J. Euro. Ceram. Soc. v.23 no.13 Silicon nitride/silicon carbide nanocomposite obtained by nitridation of SiC: fabrication and high temperatre mechanical properties M.Poorteman;P.Descamps;F.Cambier;:M.Plisnier;V.Canonne;J.C.Descamps https://doi.org/10.1016/S0955-2219(03)00088-8
  7. J. Am. Ceram. Soc. v.85 no.11 Fabrication and microstructure of silicon nitride/boron nitride nanocomposites T.Kusunose;T.Sekino;Y.H.Chao;K.Niihara https://doi.org/10.1111/j.1151-2916.2002.tb00514.x
  8. J. Mater. Sci. v.35 Microstructure and mechanical properties of SiC-platelet reinforced Al₂O₃/SiC-particle hybrid ocmposite Y.H.Chao;A.Nakahira;K.Niihara https://doi.org/10.1023/A:1004828205070
  9. J. Euro. Ceram. Soc. v.19 no.12 Fabrication and microstructure of Al₂O₃-ZrO₂(3Y)-SiC nanocomposites H.Z.Wang;L.Gao;J.K.Guo https://doi.org/10.1016/S0955-2219(99)00026-6
  10. Ceram. Inter. v.25 no.4 On the toughening mechanisms of SiC platelet-reinforced Al₂O₃/Y-TZP nano-ceramic matrix compolsites C.Kaya;F.Kaya;P.A.Trusty;A.R.Boccaccini;M.Marsoglu https://doi.org/10.1016/S0272-8842(98)00052-2
  11. J. Br. Ceram. Soc. v.80 Fast-firing-microstructural benefits M.P.Harmer;R.J.Brook
  12. Trans. J. Br. Ceram. Soc. v.82 Production of dense and fine grain size BaTiO₃by fast firing H.Mostaghachi;R.J.Brook
  13. Trans. J. Br. Ceram. Soc. v.78 no.1 Rapid sintering of pure and doped-Al₂O₃ M.P.Harmer;B.W.Roberts;R.J.Brook
  14. J. Soc. Powder & Tech. Jpn. v.30 no.11 Trends in advanced SPS (Spark Plasma Sintering) systems and technology M.Tokita https://doi.org/10.4164/sptj.30.11_790
  15. Mater. Sci. & Eng. A v.287 Sintering, consolidation, reaction and crystal growth by the Spark Plasma System (SPS) M.Omori https://doi.org/10.1016/S0921-5093(00)00773-5
  16. J. Ceram. Soc. Jpn. v.100 Sintering behaviors and consolidation process for Al₂O₃/SiC nanocomposites A.Nakahira;K.Niihara https://doi.org/10.2109/jcersj.100.448
  17. J. Am. Ceram. Soc. in Print. Strengthening and toughening mechanism of oxide based nanocomposites T.Ohji;Y.H.Choa;K.Niihara