Tribological Properties of CVD Diamond Films against Graphite

Abstract:

In this investigation, micro crystalline diamond (MCD) and nanocrystalline diamond (NCD) films are deposited on cemented carbide (WC-Co) balls by hot filament chemical vapor deposition (HFCVD) technique. After deposition, MCD and NCD films are characterized by field emission scanning electron microscopy (FESEM) and Raman spectroscopy. Then frictional tests are carried out between CVD diamond coated balls and graphite. The results show that the MCD-graphite and NCD-graphite tribo-pairs exhibit comparable frictional coefficients, while the wear rate of graphite in MCD-graphite working pair is much higher than that of graphite in NCD-graphite working pair. Furthermore, the element oxygen is detected in the wear groove of graphite, suggesting the oxycarbide of working materials at the increased temperature due to the heat generated from the mechanical friction.

• Periodical: Key Engineering Materials (Volume 689)
• Pages: 86-90
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.689.86
• Online since: April 2016
• Authors: Xue Cai Lei*, Ke Pang
• Keywords: Diamond Films, Graphite, Hot Filament CVD, Tribological Behavior

References

[1] Yao, X.L., Zeng, Z.Z., and Chen, J.L.: Electrode erosion of a high energy impulse spark gap switch, Plas. Sci. Technol., 2005, 7, p.3157.

[2] Cabral, G., Reis, P., Polini, R., Titus, E., Ali, N., Davim, J., and Grácio, J.: Cutting performance of time-modulated chemical vapour deposited diamond coated tool inserts during machining graphite, Diam. Relat. Mater., 2006, 15, (10), pp.1753-1758.

DOI: 10.1016/j.diamond.2006.03.007

[3] Gomez, H., Durham, D., Xiao, X., Lukitsch, M., Lu, P., Chou, K., Sachdev, A., and Kumar, A.: Adhesion analysis and dry machining performance of CVD diamond coatings deposited on surface modified WC-Co turning inserts, J. Mater. Process. Tech., 2012, 212, (2), pp.523-533.

DOI: 10.1016/j.jmatprotec.2011.10.020

[4] Ma, Y., Sun, F., Xue, H., Zhang, Z., and Chen, M.: Deposition and characterization of nanocrystalline diamond films on Co-cemented tungsten carbide inserts, Diam. Relat. Mater., 2007, 16, (3), pp.481-485.

DOI: 10.1016/j.diamond.2006.09.020

[5] Wang, T., Xin, H., Zhang, Z., Dai, Y., and Shen, H.: The fabrication of nanocrystalline diamond films using hot filament CVD, Diam. Relat. Mater., 2004, 13, (1), pp.6-13.

DOI: 10.1016/j.diamond.2003.08.014

[6] Sun, F., Ma, Y., Shen, B., Zhang, Z., and Chen, M.: Fabrication and application of nano–microcrystalline composite diamond films on the interior hole surfaces of Co cemented tungsten carbide substrates, Diam. Relat. Mater., 2009, 18, (2-3), pp.276-282.

DOI: 10.1016/j.diamond.2008.10.064

[7] Prawer, S., and Nemanich, R.J.: Raman spectroscopy of diamond and doped diamond, Philos Trans R Soc London Ser A, 2004, 362, (1824), pp.2537-2565.

DOI: 10.1098/rsta.2004.1451

[8] Erdemir, A., and Donnet, C.: Tribology of diamond-like carbon films: recent progress and future prospects, J Phys D: Appl Phys, 2006, 39, (18), pp. R311.

DOI: 10.1088/0022-3727/39/18/r01