Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Tribological Properties of Alumina/Graphite Composites

Alumina/graphite 복합체의 마찰마모 특성

  • Published : 1997.04.01
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Abstract

The tribological properties of ceramics are very important in the application to engineering ceramic parts such as seal rings, pump parts, thread guides, and so on. In this study, the effects of graphite addition on the mechanical and tribological properties of alumina/graphite composites were investigated. The composites were prepared by the adding of graphite powder to the mixture of Al2O3, talc and calcium carbonate. Bending strength, water absorption, friction coefficient, the amount of worn out material at a certain time, and maximum surface roughness(Rmax) of the prepared composites were measured. Crystalline phases and microstructure were examined with XRD and SEM. The melt of Al2O3-CaO-MgO-SiO2 system was shown over 10 vol% graphite composition. As the amount of the graphite is increased, needle like crystals of mullite were formed and grown. We obtained the good properties of friction coefficients and wear resistance at the powder composition containing 15 vol% of graphite.

Keywords

References

  1. Fracture Mechanics of Ceramics v.8 J. Derby;J.G. Seshadri;M. Srinivasan
  2. J. Am. Ceram. Soc. v.65 Elastic/Plastic Indentation Damage in Ceramics D.B. Marshall;B.R. Lawn;A.G. Evans
  3. BHRA paper Silicon Carbide for Mechanical Shaft Seals R.W. Lashway
  4. Friction and Wear of Ceramics Self-Lubricating Ceramic and Matrix Composites A. Gangopadhyay;S. Jahanmir;M.B. Peterson
  5. ibid A Review of the Lubricating of Ceramic with Thin Solid Films A. Erdemir
  6. J. Am. Ceram. Soc. v.45 Sintering of Alumina: Effect of Atmospheres R.L. Coble;C.J. Christensen
  7. J. Am. Ceram. Soc. v.48 Effect of Manganese Oxide on Sitering of Alumina J.R. Keski;I.B. Cutler
  8. J. Am. Ceram. Soc. v.56 Influence of Additive on the Microstructure of Sinter Al₂O₃ G. Rossi;J.E. Burke
  9. J. Am. Ceram. Soc. v.55 Grain-boundary Segregation in MgO-doped Al₂O₃ H.L. Marcus;M.E. Fine
  10. J. Am. Ceram. Soc. v.58 Additive and Impurity Distributions at Grain Boindaries in Sintered Alumina W.C. Johnson;D.F. Stein
  11. J. Am. Ceram. Soc. v.63 Grain-boundary Segregation in an MgO-doped Al₂O₃ D.R. Clarke
  12. J. Am. Ceram. Soc. v.62 The Role of MgO in the Sintering of Alumina A.H. Heuer
  13. J. Am. Ceram. Soc. v.62 Single-crystal Boundary Migration in Hot-pressed Aluminum oxide R.D. Monahan;J.W. Halloran
  14. J. Kor. Ceram. Soc. v.31 no.9 Effect of Al₂O₃and Fe₂O₃on Tribological Properties of Reaction Bonded SiC Y.H. Baik;H.K. Park
  15. J. Kor. Ceram. Soc. v.33 no.5 Tribological Properties of Reaction-Bonded SiC-Graphite Composites Y.H. Baik;J.Y. Shin