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Friction and Wear Properties of Plasma-sprayed Cr2O3-MoO3Composite Coatings at Room Temperature

MoO3가 첨가된 Cr2O3플라즈마 용사코팅의 상온 마찰 마멸 특성

  • 여인웅 (한국과학기술연구원 트라이볼로지연구센터) ;
  • 안효석 (한국과학기술연구원 트라이볼로지연구센터) ;
  • 임대순 (고려대학교 재료공학과)
  • Published : 2002.01.01

Abstract

Plasma-sprayed Cr$_2$O$_3$-based coatings containing MoO$_3$were studied to gain a better understanding of the influence of MoO$_3$composition in the coatings on their tribological behaviour. A reciprocal type tribo-tester was employed to examine friction and wear behavior of the specimens at room temperature. The physical characteristics of worn surfaces were investigated by scanning electron microscopy and chemical composition of the coating surfaces was analyzed using a X-ray photoelectron spectrometer. The results showed that friction coefficient of the MoO$_3$-added coatings were lower than those without MoO$_3$addition. However pure Cr$_2$O$_3$coating showed the lowest wear loss at the self-mated test. The larger protecting layers were observed at the worn surface of plasma spray coated specimens with MoO$_3$addition. XPS analysis of the protecting layer indicated that MoO$_3$composition was dominantly formed at the surface. MoO$_3$composition in the protecting layer appears to be more favorable in reducing the friction.

플라즈마 용사코팅법을 이용하여 산화몰리브덴이 첨가된 크로미아 용사코팅층을 제조하여 MoO$_3$첨가에 따른 마찰, 마멸특성을 조사하였다. 상온 마찰, 마멸특성에 대한 실험을 위하여 왕복동 마멸시험장치를 사용하였다. 마멸시험후 마멸면의 물리적 변화와 화학적 조성의 변화를 SEM와 XPS를 통하여 살펴보았다. 산화몰리브덴이 첨가된 코팅층에서 마찰계수의 감소를 관찰할 수 있었다. 그러나 마멸량의 경우 산화몰리브덴이 첨가되지않은 크로미아 코팅층에서 가장 낮은 값을 나타내었다. 산화몰리브덴이 첨가된 코팅의 마멸된 표면에 마탈, 마멸에 유리한 보호막의 형성이 광범위하게 일어남을 알 수 있었다. 이러한 보호막에 산화몰리브덴이 MoO$_3$의 형태로 존재하는 것을 XPS분석을 통하여 알 수 있었다. 보호막에 산화몰리브덴의 존재가 마찰계수를 감소시키는 것으로 생각된다.

Keywords

References

  1. Advances in Ceramics v.3 Ziroconia Thermal Barrier Coatings R. J. Bratton;S. K. Lau
  2. Wear v.162-164 Wear Behavior of Plasma-sprayed Partially Stabilized Zirconia on a Steel Substrate H-S. Ahn;O. K. Kwon https://doi.org/10.1016/0043-1648(93)90556-2
  3. J. Kor. Ceram. Soc. v.30 no.12 High Temperature Wear of Plasma-sprayed $ZrO_2-Y_2O_3$ Coatings J. Y. Kim;D. S. Lim;H-S. Ahn
  4. J. Kor. Ceram. Soc. v.31 no.10 The Effects of the Annealing Temperature and Environments on Room Temperature Wear Behavior of Plama-sprayed Partially Stabilized Zirconia Coatings J. Y. Kim;D. S. Lim
  5. Wear v.203-204 Tribological Behavior of Plasma-sprayed Zirconia Coatings H-S. Ahn;J. Y. Kim;D. S. Lim https://doi.org/10.1016/S0043-1648(96)07395-4
  6. SAE Tech. Paper 830314 TACOM/Cummins Adiabatic Engine Program W. Bryzik;R. Kamo
  7. ANAPS-Materials Publication v.2 no.3 Thermal barrier coatings for reciprocal engines, Newsletter, Surface Architecture
  8. Advanced Materials and Processes v.130 Reliable Ceramics for Heat Engines L. M. Sheppard
  9. Wear v.169 Plasma-sprayed Coatings Treated with Lasers : Tribological Behavior of $Cr_2O_3$ J. M. Cuetos;E. Fernandez;R. Vijande;A. Rincon;M. C. Perez https://doi.org/10.1016/0043-1648(93)90295-W
  10. Proceedigns of 1st World Tribology Congress v.115 Sliding Wear of Plasma-sprayed Chromium Oxide-silica Coating H. S. Ahn;S. K. Lee
  11. Surface and Coatings Technology v.133-134 Influence of Molybdenum Composition in Chromium Oxide-based Coatings on Their Tribological Behavior H-S. Ahn;I. W. Lyo;D. S. Lim https://doi.org/10.1016/S0257-8972(00)00892-6
  12. Wear v.225-229 Tribological Behaviour of Plasma-sprayed Chromium Oxide Coating H-S. Ahn;O. K. Kwon https://doi.org/10.1016/S0043-1648(98)00390-1
  13. J. Kor. Ceram. Soc. v.36 no.4 Study on the Spraying Prameters of a Plasma-sprayed Hydroxyapatite Coating I. W. Lyo;H-S. Ahn
  14. J. Tribo. v.114 The Effect of Tribofilm Formation and Humidity on the Friction and Wear Properties of Ceramic Materials K. Komvopoulos;H. Li https://doi.org/10.1115/1.2920851