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Corrosion science and technology v.6 no.4, 2007년, pp.159 - 163  

The Lubricant Effect of Oxidation and Wear Products of HVOF Co-alloy T800 Powder Coating

Cho, Tong Yul   (School of Nano Advanced Materials Engineering, Changwon National UniversityUU0001233  ); Yoon, Jae Hong   (School of Nano Advanced Materials Engineering, Changwon National UniversityUU0001233  ); Kim, Kil Su   (School of Nano Advanced Materials Engineering, Changwon National UniversityUU0001233  ); Song, Ki Oh   (School of Nano Advanced Materials Engineering, Changwon National UniversityUU0001233  ); Youn, Suk Jo   (Sermatech Korea, LTD  ); Chun, Hui Gon   (School of Materials Science and Engineering, University of UlsanUU0001014  ); Hwang, Soon Young   (Research Institute of Industrial Science & TechnologyCC0011989  );
  • 초록

    Micron size Co-alloy 800 (T800) powder is coated on the high temperature, oxidation and corrosion resistant super alloy Inconel 718 substrate by the optimal high velocity oxy-fuel (HVOF) thermal spray coating process developed by this laboratory. For the study of durability improvement of high speed spindle operating without lubricants, friction and sliding wear behaviors of the coatings are investigated both at room and at an elevated temperature of $1000^{\circ}F(538^{\circ}C)$ . Friction coefficients, wear traces and wear debris of coatings are drastically reduced compared to those of non-coated surface of Inconel 718 substrate both at room temperature and at $538^{\circ}C$ . Friction coefficients and wear traces of both coated and non-coated surfaces are drastically reduced at higher temperature of $538^{\circ}C$ compared with those at room temperature. At high temperature, the brittle oxides such as CoO, $Co_{3}O_{4}$ , $MoO_2$ and $MoO_3$ are formed rapidly on the sliding surfaces, and the brittle oxide phases are easily attrited by reciprocating slides at high temperature through oxidation and abrasive wear mechanisms. The brittle solid oxide particles, softens, melts and partial-melts play roles as solid and liquid lubricants reducing friction coefficient and wear. These show that the coating is highly recommendable for the durability improvement coating on the machine component surfaces vulnerable to frictional heat and wear.


  • 주제어

    sliding wear test .   melts .   and partial-melts .   solid and liquid lubricants.  

  • 참고문헌 (12)

    1. T. Y. Cho, J. H. Yoon, K S. Kim, N. K. Baek, S. Y. Hwang, S. J. Youn, and H. G. Chun, 15th Aero Tech nology Symposium, Logistics Command ROKAF, 2006 
    2. T. Y. Cho, J. H. Yoon, K. S. Kim, S. J. Youn, N. K. Back, and H. G. Chun, J. Kor. Inst. Crystal Growth and Crystal Tech., 16, 273 (2006)     
    3. T. Y. Cho, J. H. Yoon, K. S. Kim, S. J. Youn, N. K. Baek H. G. Chun, and S. Y. Park, J. Kor. Inst. Surf Eng. 39, 240 (2006)     
    4. N. J. Kim, Dictionary of Metal Engineering, p.2031, Junyong, 2003 
    5. T. Y. Cho, J. H. Yoon, K. S. Kim, B. K. Park, S. J. Youn, N. K. Baek, and H. G. Chun, J. Korean Crystal Growth and Crystal Technology, 16, 121 (2006)     
    6. B. D. Sartwell, et al. Naval Research Laboratory Report Number NRL/MR/6170- 04-8762, p.1-15, (2004) 
    7. B. D. Sartwell, K. Legg, and B. Bodger, Conference for Environmental Excellence, p.231, USA, 1999 
    8. T. G. Massalski, et. aI., 'Binary Alloy Phase Diagram', Am. Soc. for Metals 1, p.600, 1986 
    9. J. R. Davis, Handbook of Thermal Spray Technology, p.1, ASM Thermal Spray Society, USA (2004) 
    10. T. Y. Cho, J. H. Yoon, K. S. Kim, N. K. Baek, K. O. Song, S. J. Youn, S. Y. Hwang, and H. G. Chun, J. Kor. Inst. Surf Eng. 39, 295 (2006)     
    11. K. S. Kim, N. K. Baek, J .H. Yoon, T. Y. Cho, S. J. Youn, S .K. Oh, S .Y. Hwang, and H .G. Chun, J. Kor. Inst. Surf Eng., 39, 179 (2006)     
    12. T. Y. Cho, J. H. Yoon, K. S. Kim, S. J. Youn, N. K. Baek, B. C. Park, and H. G. Chun, Trans. Kor. Soc., Machine Tool Engineers, 32, 32 (2006) 

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