공침법에 의한 소결첨가제의 균일혼합이 $Si_3N_4$ 상압소결체의 기계적 특성에 미치는 영향

Effect of Homogeneous Mixing of Sintering Additives by Coprecipitation Method on Mechanical Properties of Pressureless-Sintered $Si_3N_4$

  • 발행 : 1993.04.01

초록

Effect of mixing homogeneity in powder mixtures of Si3N4 and sintering additive (10mol% YAG) prepared by coprecipitation on the mechanical properties of pressureless-sintered body was investigated. Sintering was performed in a graphtie furnace at 1850℃ for 0.5h under 0.15MPa N2 atmosphere using Si3N4 powder bed. Results from the measurement of Young's modulus, Vickers hardness, 4-point-bending strength, and KIC for the coprecipitation-treated (CP) and the mechanically-mixed specimens(MM) showed that a remarkable improvement in flexural strength and Weibull parameter can be achieved for the CPspecimens: (677±68MPa, 12.0) for CP samples and (539±108MPa, 5.5) for MM. Other properties were almost same irrespective of preparation methods.

키워드

참고문헌

  1. J. Am. Ceram. Soc. v.72 Powder Processing Science and Technology for Increased Reliability F.F. Lange
  2. J. Am. Ceram. Soc. v.65 Structural Reliability: A Processing-Dependent Phenomenon A.G. Evans
  3. Processing of Crystalline Ceramics Physical and Chemical Parameters Controlling the Homogeneity of Fine Grained Powders and Sintering Materials M. Paulus;H. Palmour Ⅲ.(ed.);R F. Davis(ed.);T.M. Hare(ed.)
  4. Am Ceram. Soc Bull. v.60 Nonconventional Powder Preparation Techniques D.W. Johnson
  5. Emergent Process Methods for High Tech Ceramics The Science of the Interaction of Colloidal Particles and Ceramic Processing A. Bleier;H. Palmour Ⅲ.(ed.);R.F Davis(ed.);R.L. Porter(ed.)
  6. Adv Ceram. Mater. v.3 Techniques for Agglomeration Control During Wet-Chemical Powder Synthesis A. Roosen;H. Hausner
  7. Mater. Sci Eng v.A109 Processing of Silicon Nitride Ceramics P. Greil
  8. J Am. Ceram. Soc. v.69 Preparation and Sintering of Homogeneous Silicon Nitride Green Compacts T.M. Shaw;B A. Pethica
  9. J Ceram. Soc of Japan v.93 Preparation of Sialon Powder from Alkoxides M. Mitomo;T. Shogai;H Yoshimatsu;Y. Kitami
  10. Adv. Ceram. Mater. v.2 Preparation of $Si_3N_4$ and AIN Powders from Alkoxide-Derived Oxides by Carbothermal Reduction and Nitridation M. Mitomo;Y. Yoshioka
  11. Ceram. Int. v.14 Preparation of α-Sialon Powders by Carbothermal Reduction and Nitridation M. Mitomo;M. Takeuchi;M Ohmasa
  12. J Ceram Soc. of Japan v.96 Interaction of Aluminum-Iso-Propoxide Solution and $Si_3N_4$ Powder K. Kishi;S. Umebayashi;R. Pompe;M. Persson
  13. J. Europ. Ceram. Soc. v.5 Sol-Gel Coating of Silicon Nitride with Mg-Al Oxide Sintering Aid M. Kulig;W. Oroshin;P. Greil
  14. Homogeneous Mixing of $Si_3N_4$ with Sintering Additives by Coprecipitation Method J.S. Kim
  15. DEA 3637506 A1 Verfahren zur Herstellung von ingenieurkeramischen Pulvern mit Additiven Wickel Franz;Schoenfelder
  16. J Phys. E: Sci. Instrum. v.16 no.181 Ultrasonic Instrumentation: Principles, Methods and Applications D.I. Crecraft
  17. Mater. Sci. Eng. v.71 The Effect of the α-Phase on the Elastic Properties of $Si_3N_4$ O. Yeheskel;Y Gefen
  18. J. Ceram. Soc. of Japan v.97 Microstructure Dependence of Fracture Toughness and Hardness of Silicon Nitride K. Ueno
  19. J. Am Ceram Soc. v.65 Microhardness and Elastic Modult of Si-Y-Al-O-N Glasses D.R. Messier;A. Broz
  20. Sumitomo Electric Technical Review v.23 Development of a High-Strength $Si_3N_4$ Sintered Body T. Nishioka;K. Matsunuma;Y. Kuwagaki;Y. Takano;M. Higuchi;M. Honda;M. Miyake
  21. J. Am. Ceram. Soc. v.62 Fracture Toughness of $Si_3N_4$ as a Function of the Initial α-Phase Content F.F. Lange