Abstract
This study describes wire electrical discharge machining (WEDM) of carbon nanofibers (CNFs) in air. Since EDM is able to machine any conductive material, it can be used to machine CNFs without causing physical damage. WEDM was applied for leveling and patterning of CNF mats, which improves the performance of field emission of CNFs. For WEDM, a wire jig system as well as debris-removing system was developed. The machining characteristics such as the effect of voltage and capacitance were investigated. WEDM in air was used for the post processing of CNF mats with high efficiency and productivity. Compared to EDM using a single tool electrode, WEDM reduced machining time to 1/10th of the previously required time.
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Melechko, A. V., Merkulov, V. I., McKnight, T. E., Guillorn, M. A., Klein, K. L., Lowndes, D. H. and Simpson, M. L., “Vertically aligned carbon nanofibers and related structures: Controlled synthesis and directed assembly,” J. Appl. Phys., Vol. 97, No. 4, Paper No. 041301, 2005.
Temple, D., “Recent progress in field emitter array development for high performance applications,” Mater. Sci. and Eng. R: Reports, Vol. 24, No. 5, pp. 185–239, 1999.
Chen, K. F., Chen, K. C., Jiang, Y. C., Jiang, L. Y., Chang, Y. Y., Hsiao, M. C. and Chan, L. H., “Field emission image uniformity improvement by laser treating carbon nanotube powders,” Appl. Phys. Lett., Vol. 88, No. 19, Paper No. 193124, 2006.
Zhi, C. Y., Bai, X. D. and Wang, E. G., “Enhanced field emission from carbon nanotubes by hydrogen plasma treatment,” Appl. Phys. Lett., Vol. 81, No. 9, pp. 1690–1692, 2002.
Lim, S. C., Jeong, H. J., Park, Y. S., Bae, D. S., Choi, Y. C., Shin, Y. M., Kim, W. S., An, K. H. and Lee, Y. H., “Field-emission properties of vertically aligned carbon-nanotube array dependent on gas exposures and growth conditions,” J. Vac. Sci. Technol. A, Vol. 19, No. 4, pp. 1786–1789, 2001.
Kim, K. B., Song, Y. H., Hwang, C. S., Chung, C. H. and Lee, J. H., “Efficient electron emissions from printed carbon nanotubes by surface treatments,” J. Vac. Sci. Technol. B, Vol. 22, No. 3, pp. 1331–1334, 2004.
Ok, J. G., Kim, B. H., Sung, W. Y., Chu, C. N. and Kim, Y. H., “Uniformity enhancement of carbon nanofiber emitters via electrical discharge machining,” Appl. Phys. Lett., Vol. 90, No. 3, Paper No. 033117, 2007.
Kim, B. H., Ok, J. G., Kim, Y. H. and Chu, C. N., “Electrical discharge machining of carbon nanofiber for uniform field emission,” Ann. CIRP, Vol. 56, No. 1, pp. 233–236, 2007.
Ok, J. G., Kim, B. H., Chung, D. K., Sung, W. Y., Lee, S. M., Lee, S. W., Kim, W. J., Park, J. W., Chu, C. N. and Kim, Y. H., “Electrical discharge machining of carbon nanomaterials in air: machining characteristics and the advanced field emission applications,” J. Micromech. Microeng., Vol. 18, No. 2, Paper No. 025007, 2008.
Zhu, Y. W., Sow, C.-H., Sim, M.-C., Sharma, G. and Kripesh, V., “Scanning localized arc discharge lithography for the fabrication of microstructures made of carbon nanotubes,” Nanotechnology, Vol. 18, No. 38, Paper No. 385304, 2007.
Khalid, W., Mohamed Ali, M. S., Dahmardeh, M., Choi, Y., Yaghoobi, P., Nojeh, A. and Takahata, K., “High-aspect-ratio, free-form patterning of carbon nanotube forests using micro-electro-discharge machining,” Dia. Rel. Mat., Vol. 19, No. 11, pp. 1405–1410, 2010.
Dahmardeh, M., Nojeh, A. and Takahata, K., “Possible mechanism in dry micro-electro-discharge machining of carbon-nanotube forests: A study of the effect of oxygen,” J. Appl. Phys., Vol. 19, No. 9, Paper No. 093308, 2011.
Chung, D. K., Shin, H. S., Park, M. S., Kim, B. H. and Chu, C. N., “Recent researches in micro electrical machining,” Int. J. Precis. Eng. Manuf., Vol. 12, No. 2, pp. 371–380, 2011.
Ok, J. G., “Electrical discharge machining of carbon nanomaterials: a study on the machining characteristics and the advanced field emission applications,” M.S. Thesis, School of Mechanical and Aerospace Engineering, Seoul National University, 2007.
Kunieda, M. and Yoshida, M., “Electrical discharge machining in gas,” Ann. CIRP, Vol. 46, No. 1, pp. 143–146, 1997.
Abbas, N. M., Solomon, D. G. and Bahari, M. F., “A review on current research trends in electrical discharge machining (EDM),” Int. J. Mach. Tools Manuf., Vol. 47, No. 7–8, pp. 1214–1228, 2007.
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Park, J.W., Chung, D.K., Kim, B.H. et al. Wire electrical discharge machining of carbon nanofiber mats for field emission. Int. J. Precis. Eng. Manuf. 13, 593–599 (2012). https://doi.org/10.1007/s12541-012-0076-5
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DOI: https://doi.org/10.1007/s12541-012-0076-5