Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Effect of Seeding on Microstructural Development of Silicon Nitride Ceramics

질화규소 세라믹스의 미세조직 형성에 미치는 Seed 첨가의 영향

  • 이창주 (성균관대학교 재료공학과)
  • Published : 1998.06.01
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Abstract

The effect of $\beta$-$Si_3N_4$ seeding on microstructural development of silicon nitride based materials has been investigated. In particular, to observe more distinctly the abnormal grain growth in pressureless sintering, fine $\alpha$-$Si_3N_4$(mean particle size: 0.26 ${\mu}m$) powder classified by sedimentation method was used. It was possible to prepare silicon nitride with abnormally grown grains under low nitrogen pressure of 1 atm thanks to the heterogeneous nucleation on $Si_3N_4$ seed particles. The size and morphology of silicon nitride grains were strongly influenced by the presence of $\beta$-$Si_3N_4$ seed and overall chemical composition. For specimens with initially low $\beta$-content, the large grains grew without a significant impingement by other large grains. On the contrary, for specimens with initially high $\beta$-content, steric hindrance was effective. The resulting microstructure was less inhomogeneous and characterized by unimodal grain size distribution.

Keywords

References

  1. J. Am. Ceram. Soc. v.62 Mechanical Properties of Hot-Pressed Silicon Nitride with Different Grain Structures G. Himsolt;H. Knoch;H. Huebner;F. W. Kleinlein
  2. J. Am. Ceram. Soc. v.62 Fracture Toughness of Si₃N₄ as a Function of the Initial α-Phase Content F. F. Lange
  3. Proceedings of the 1st International Symposium on Ceramic Components for Engine Microstructural Development of Sintered, Hot-Pressed and ot-Isostaticpressed Silicon Nitride, Edited by S. Somiya, E. Kanni, and K. Ando G. Wotting;G. Ziegler
  4. J. Am. Ceram. Soc. v.77 Microstructure Characterization of Gas-Pressure-Sintered β-Silicon Nitride Containing Large β-Silicon Nitride Seeds N. Hirosaki;Y. Akimune;M. Mitomo
  5. J. Am. Ceram. Soc. v.77 Microstructure Control of Silicon Nitride by Seeding with Rodlike β-Silicon nitride Particles K. Hirao;T. Nagaoka;M. E. Brito;S. Kanzaki
  6. J. Am. Ceram. Soc. v.75 Microstructure Development during Gas-Pressure Sintering of α-Silicon Nitride M. Mitomo;S. Uenosono
  7. J. Am. Ceram. Soc. v.76 Effect of Grain Growth β-Silicon Nitride on Strength, Weilbull Modulus, and Fracture Toughness N. Hirosaki;Y. Akimune;M. Mitomo
  8. Mater. Res. Soc. Symp. Proc. 287 Silicon Nitride Ceramics: Scientific and Technological Advances N. Hirosaki;Y. Akimune;M. Mitomo;I-W. Chen(ed.);P. F. Becher(ed.);M. Mitomo(ed.);G. Petzow(ed.)'T-S. Yen(ed.)
  9. Proc. 3rd IUMRS Int. Conf. Advenced Materials S-M. Han;Sm-M. Lee;S-J.L. Kang
  10. J. Am. Ceram. Soc v.73 Effect of α. to β(β') Phase Transition on the Sintering of Silicon Nitride Ceramics D-D. Lee;S-J.L. Kang;G. Pctzow;D. N. Yoon
  11. J. Ceram. Soc. Jpn v.101 Quantitative Analysis of Microstructure of Self-Reinforced Silicon Nitride Ceramics N. Hirosaki;Y. Akimunc;M. Mitomo
  12. Proceddings of the 1st International Symposium on the Science of Engineering Ceramics Toughening of Silicon Nitride Ceramics M. Mitomo;S. Kimura(ed.);K. Niihara(ed.)
  13. Materials Science Forum, Trans Tech Publishers, Aedermannsdorf v.113;115 Grain Growth Studies in Si₃N₄-Ceramics G. Petzow;M. J. Hoffmann
  14. Silicon nitride Ceramics. The Influence of Powders and Processing Methods on Microstructure and Properties of Dense Silicon Nitride G. Wotting;H. Feure;E. Gugel;I-W. Chen(ed.);P. F. Becher(ed.);M. Mitomo(ed.);G. Petzow(ed.);T. S. Yen(ed.)
  15. J. Am. Ceram. Soc. no.71 D-D. Lee;S-J. L. Kang;D. N. Yoon
  16. Silicon Nitride Ceramics-Scientific and Technological Advances Microstructural Design of Si₃N₄ Based Ceramics M. J. Hoffmann;G. Petzow;I-W. Chen(ed.);P. F. Becher(ed.);M. Mitomo(ed.);G. Petzow(ed.);T-S. Yen MRS(ed)