Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of Impurities in Grain Boundary Phases on Wear Behavior of $Si_3N_4$

질화규소의 입계상에 존재하는 불순물이 마모에 미치는 영향

  • 오윤석 (고려대학교 재료공학과) ;
  • 임대순 (고려대학교 재료공학과) ;
  • 이경호 (순천향대학교 재료공학과)
  • Published : 1996.03.01
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Abstract

The water test results indicated that the impurities had detrimetal effect on the wear resistance of silicon nitride and the effects were getting severe as the temperature increased. Especially when Ca existed as an impurity the detrimental effects was the most severe. These results were resulted from the fact that impurities lowered the mechanical properties of the grain boundary phase of silicon nitride. The wear test results of glass/glass-ceramic specimens having a similar composition to the grain boundary phase of silicon nitride revea-led that the specimen containing CaO showed the lowest wear resistance. The existence of Fe and Ca at the grain boundary phase assisted forming a grain boundary phase with relatively low refractoriness. Therefore at a given wear condition the removal of deformed layer would be easier. The results showed that the glass phases could be modified by heat-treatment and this modification improved tribological characteristics of the silicon nitride.

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References

  1. J. of Mat. Sci. v.22 Review: Relationships between Processing, Microstructure and Properties of Dense and Reaction-bonded Silicon Nitride G. Ziegler;J. Hcinrich;G. Wotting
  2. J. Am. Ceram. Soc. v.73 no.6 Grain-Boundary-Phase Crystallization and Strength of Silicon Nitride Sintered with a YSiAION Glass Michael K.Cinibulk;Gareth Thomas;Sylvia M.Johnson
  3. J. of Mater. Sci. v.9 The Microstructures of Silicon Nitride Ceramics During Hot-Pressing Transformations P. Drew;M.H. Lewis
  4. J. Am. Ceram. Soc. v.76 no.2 Microstructural Evolution in Annealed and Crept Silicon Nitride Margaret M. Chadwick;David S. Wilkinson
  5. J. Am. Ceram. Soc. v.77 no.4 Calcium Concentration Dependence of the Intergranular Film Thickness in Silicon Nitride Isao Tanaka;Hans-Joachim Kleebe;Michael K. Cinibulk;John Bruley;David R. Clarke;Manfred Ruhle
  6. J. Am. Ceram. Soc. v.73 no.12 Microstructural Evolution in Near-Eutectic Yttrium Silicate Compositions Fabricated from a Bulk Melt and as an Intergranular phase in Silicon Nitride William E. Lee;Charles H. Drummond Ⅲ;Gregory E. Hilmas;Suresh Kumar
  7. J. Am. Ceram. Soc. v.62 no.9-10 Preparation and Properties of Yttrium-Silicon-Aluminum Oxynitride Glasses R.E. Loehman
  8. Ceram. Eng. Sci. Proc. v.9 no.9-10 Microstructural Evolution on Crystallizing the Glassy Phase in a 6 wt% Y₂O₃-Si₃N₄Ceramic W.E. Lee;C.H. Drummond Ⅲ;G.E. Hilmas;J.D. Kiser;W.A. Sanders
  9. J. Am. Ceram. Soc. v.77 no.4 Processing, Microstructure, and Wear Behavior of Silicon Nitride Hot-Pressed with Alumma and Yttria Ajoy Zutshi;Richard A. Harber;Dale E. Niesz;Jane W. Adams;John B. Wachtman
  10. J of Mat. Sci. v.28 Effect of Active Metal Coating on the Mechanical Properties of Silicon Nitride-based Ceramics S. Kang;J.H. Selverian
  11. Glass-Ceramic Materials Z. Strad