Tribological Properties of Clay Bonded SiC

점토 결합 SiC 소결체의 마찰 마모 특성

  • 한상준 (명지대학교 무기재료공학과) ;
  • 이경희 (명지대학교 무기재료공학과) ;
  • 이재한 (명지대학교 무기재료공학과) ;
  • 김홍기 (명지대학교 무기재료공학과)
  • Published : 1995.09.01

Abstract

SiC had been widely applied for mechanical sealing as a sealing material. SiC sintering is commonly made of reaction sintering, presureless sintering, and hot isostatic pressing (HIP) sintering. In this investigation, however, clay bonded sintering was used to avoide any complications of the special sintering methods as mentioned above. In order to prevent harmful SiC oxidation in the clay bonded sintering, clay and frit were used to form the SiC oxidation protecting layer and graphite was added to provide high solid lubricity. As a result, the material with 6% clay (clay 5.4% and frit 0.6%) and 2~4% graphite (45 mesh) sintered at 140$0^{\circ}C$ for 3 hours, showed the following physical properties; porosity 6%, static friction coefficient 0.15, kinematic coefficient 0.1,. and specific wear rate 4.8$\times$10-8 $\textrm{mm}^2$kgf-1. On the other hand, the flexural strength was 900kgf/$\textrm{cm}^2$. This tribological characteristic properties were similar to those of the reaction sintered SiC except the flexural strength.

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References

  1. Sintered Silicon Carbides with controlled Porosity for Mechanical Face seal Applications R. Divakar
  2. 日本 セラミソクス協會學術論文集 v.97 no.2 Wear Behaviour of Silicon Nitride Ball M. Iwasa;M. Kinoshita
  3. J. Am. Ceram. Soc. v.75 no.6 Reactions of Silicon Carbide and Silicon (Ⅳ) Oxide at Elevated Temperatares Natham S.;Jacobsan;Kang. N. Lee;Dennis;S. Fox
  4. J. Ceram. Ass. Japan v.67 no.7 炭化珪素燒結體の 酸化におよぼす, 粘土結合劑の 影饗 鈴木弘茂
  5. J. Ceram. Ass. Japan v.67 no.8 炭化珪素燒結體の 酸化におよぼす K₂O-Al₂O₃-SiO₂結合濟の 影饗 影木弘茂;山內俊吉
  6. 耐化物 v.39-695 no.12 炭素含有 耐化物の 酸化防止について 松村龍雄;北井恒雄;保木井利之