Nanohardness vs. Friction Behavior in Magnetron Sputtered and PECVD W-C Coatings

Abstract:

The nanoindentation and tribological measurements were performed on DC and RF magnetron sputtered W-C coatings to optimize the deposition conditions to obtain maximum nanohardness and to compare their properties and behavior with earlier studied PECVD W-C coatings. Despite number of similarities, some consequences of a tribo-chemical transfer film formation are inconsistent with the existing wear model for W-C coatings with controlled carbon content. Transfer films in the friction contact consist from iron- and tungsten oxides and carbon generated during carbide oxidation. The role of carbon in the transfer films leading to high coefficients of friction has to be principally different from the expected lubricative role of carbon in W-C coatings and needs further study.

• Periodical: Key Engineering Materials (Volume 586)
• Pages: 35-38
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.586.35
• Online since: September 2013
• Authors: František Lofaj, Milan Ferdinandy, Peter Hornak
• Keywords: Coefficient of Friction, Magnetron Sputtering, Nanohardness, W-C Coatings

References

[1] Y. Pauleau, Ph. Gouy-Pailler, Very hard solid-solution-type tungsten-carbon coatings deposited by reactive magnetron sputtering, Mater. Lett. 13 (1992) 157-160.

DOI: 10.1016/0167-577x(92)90129-8

[2] N. Radic, B. Gržeta, O. Milat, J. Ivkov, M. Stubičar, Tungsten-carbon films prepared by reactive sputtering from argon-benzene discharges, Thin Solid Films 320 (1998) 192-197.

DOI: 10.1016/s0040-6090(97)00758-x

[3] C. Rebholz, J.M. Schneider, A. Leyland, A. Matthews, Wear behavior of carbon-containing tungsten coating prepared by reactive magnetron sputtering, Surf. Coat. Technol. 112 (1999) 85-90.

DOI: 10.1016/s0257-8972(98)00786-5

[4] S. Yang, D. Camino, A.H.S. Jones, D.G. Teer, Deposition and tribological behavior of sputtered carbon hard coatings, Surf. Coat. Technol. 124 (2000) 110-116.

DOI: 10.1016/s0257-8972(99)00634-9

[5] A. Czyzniewski, Deposition and some properties of nanocrystalline WC and nanocomposite WC/a-C: H coatings, Thin Solid Films 433 (2003) 180-185.

DOI: 10.1016/s0040-6090(03)00324-9

[6] M.D. Abad, M.A. Munoz-Márquez, S. El Mrabet, A. Justo, J.C. Sánchez-López, Tailored synthesis of nanostructured WC/a-C coatings by dual magnetron sputtering, Surf. Coat. Technol. 204 (2010) 3490-3500.

DOI: 10.1016/j.surfcoat.2010.04.019

[7] Y. Liu, M. Gubisch, W. Hild, M. Scherge, L. Spiess, C. Knedlik, J.A. Schaefer, Nanoscale multilayer WC/C coatings developed for nanopositioning, part II: Friction and wear, Thin Solid Films 488 (2005) 140-148.

DOI: 10.1016/j.tsf.2005.03.020

[8] Y. Liu, M. Gubisch, L. Spiess, J.A. Schaefer, Sliding friction of nanocomposite WC1-x/C coatings: transfer film and its influence on tribology, J. Nanosci Nanotechnol. 9 (2009) 3499-3505.

DOI: 10.1166/jnn.2009.ns23

[9] S. El Mrabet, M.D. Abad, J.C. Sánchez-López, Identification of the wear mechanisms on WC/C nanostructured coatings, Surf. Coat. Technol. 206 (2011) 1913-20.

DOI: 10.1016/j.surfcoat.2011.07.059

[10] F. Lofaj, M. Mikula, B. Grančič, G. Cempura, P. Horňák, P. Kúš, D. Kottfer, Tribological properties of TiBx and WC/C coatings, Ceramics – Silikáty 55 (2011) 305-11.

[11] F. Lofaj, M. Ferdinandy, G. Cempura, J. Dusza, Nanoindentation, AFM and tribological properties of thin nc-WC/a-C coatings, J. Eur. Ceram. Soc. 32 (2012) 2043-51.

DOI: 10.1016/j.jeurceramsoc.2012.01.037

[13] F. Lofaj, M. Ferdinandy, G. Cempura, P. Horňák, M. Vnouček, Transfer film in a friction contact in the nanocompositeWC-C coatings, J. Australian Ceram. Soc. 49 (2013) 37-46.

[14] S. El Mrabet, M.D. Abad, C. López-Cartes, D. Martínez-Martínez, J.C. Sánchez-López, Thermal evolution of WC/C nanostructured coatings by Raman and in situ XRD analysis, Plasma Process. Polym. 6 (2009) 444-49.

DOI: 10.1002/ppap.200931004