Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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A Study on the Microstructure and Physical Properties of Cold Sprayed Cu/CNT Composite Coating

저온 분사 코팅법으로 제조된 Cu/CNT 복합 코팅층의 미세조직 및 물성 연구

  • 권성희 (안동대학교 공과대학 신소재공학부 청정소재기술연구센터) ;
  • 박동용 ((주) 태광테크 기술연구소) ;
  • 이대열 ;
  • 어광준 (한국기계연구원 부설 재료연구소 신금속재료연구부) ;
  • 이기안 (안동대학교 공과대학 신소재공학부 청정소재기술연구센터)
  • Received : 2008.01.10
  • Published : 2008.03.22
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Abstract

Carbon nanotubes(CNTs) have outstanding mechanical, thermal, and electrical properties. Thus, by placing nanotubes into appropriate matrix, it is postulated that the resulting composites will have enhanced properties. Cold spray can produce thick metal-based composite coatings with very high density, low oxygen content, and phase purity, which leads to excellent physical properties. In this study, we applied cold spray coating process for the consolidation of Cu/CNT composite powder. The precursor powder mixture, in which CNTs were filled into copper particles, was prepared to improve the distribution of the CNT in copper matrix. Pure copper coating was also conducted by cold spraying as a reference. Annealing heat treatment was applied to the coating to examine its effect on the properties of the composite coating. The hardness of Cu/CNT composite coating represented similar value to that of pure copper coating. It was importantly found that the electrical conductivity of the Cu/CNT composite coating significantly increased from 53% for the standard condition to almost 55% in the optimized condition, taking annealed ($500^{\circ}C/1hr$.) copper coating as a reference (100%). The thermal conductivity of Cu/CNT composite coating layer was higher than that of pure Cu coating. It was also found that the electrical and thermal conductivities of Cu/CNT composite could be improved through annealing heat treatment. The microstructural evolution of Cu/CNT coating was also investigated and related to the macroscopic properties.

Keywords

Acknowledgement

Supported by : 산업자원부

References

  1. Y. S. Kim, and M. J. Verrilli, J. Kor. Inst. Met. & Mater. 33, 525 (1995)
  2. S. C. Yoon, Y. G. Jeong, and H. S. Kim, Transaction of Materials Processing 15, 360 (2006) https://doi.org/10.5228/KSPP.2006.15.5.360
  3. D. Raabe, and U. Hangen, Acta Mater. 44, 953 (1996) https://doi.org/10.1016/1359-6454(95)00239-1
  4. J. S. Song, and S. I. Hong, J. Kor. Inst. Met. & Mater. 39, 778 (2001)
  5. S. Ohsaki, K. Yamazaki, and K. Hono, Scripta Mater. 48, 1596 (2003)
  6. S. R. Dong, L. P. Tu, and X. B. Zhang, Mater. Sci. Eng. A 313, 83 (2001) https://doi.org/10.1016/S0921-5093(01)00963-7
  7. S. Arai, and M. Endo, Electrochem. Commun. 5, 797 (2003) https://doi.org/10.1016/j.elecom.2003.08.002
  8. D. Y. Ying, and D. L. Zhang, Mater. Sci. Eng. A 286, 152 (2000) https://doi.org/10.1016/S0921-5093(00)00627-4
  9. S. S. Wang, E. Joselevich, A. T. Woolley, C. L. Cheung, and C. M. Lieber, Nature 394, 52 (1998) https://doi.org/10.1038/27873
  10. G. D. Zhan, J. C. Kuntz, A. K. Mukherjee, P. Zhu, and K. Koumoto, Scripta Mater. 54, 77 (2006) https://doi.org/10.1016/j.scriptamat.2005.09.003
  11. H. Zhan, C. Zheng, W. Chen, and M. Wang, Chem. Phys. Lett. 411, 373 (2005) https://doi.org/10.1016/j.cplett.2005.06.058
  12. T. Laha, A. Agarwal, Tim McKechine, and S. Seal, Mater. Sci. Eng. A 381, 249 (2004) https://doi.org/10.1016/j.msea.2004.04.014
  13. Patent Cooperation Treaty, KR2006, No. 001120 (2006)
  14. S. H. Kwon, D. Y. Park, H. J. Kim, and K. A. Lee, J. Kor. Inst. Met. & Mater. 45, 216 (2007)
  15. E. Dujardin, T. W. Ebbesen, H. Hiur, and K. Tanigaki, Science 265, 1850 (1994) https://doi.org/10.1126/science.265.5180.1850
  16. R. M. German, Sintering Theory and Practice, p.544 John Wiley & Sons, Canada (1996)
  17. W. Y. Li, C. J. Li, and H. Liao, J. Therm. Spray Technol. 15, 206 (2006) https://doi.org/10.1361/105996306X108066
  18. T. Stoltenhoff, C. Borchers, F. Grtner, and H. Kreye, Surf. Coat. Technol. 200, 4947 (2006) https://doi.org/10.1016/j.surfcoat.2005.05.011
  19. F. Gartner, T. Stoltenhoff, T. Schmidt, and H. Kreye, Thermal Spray 2005, E. Lugscheider, Ed., ASM International, Basel, Switzerland, 158 (2005)
  20. C. Borchers, F. Grtner, T. Stoltenhoff, H. Assadi, and H. Kreye, J. Appl. Phy. 93, 10064 (2003) https://doi.org/10.1063/1.1573740