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X-Ray Studies of Near-Frictionless Carbon Films.

  • Nikhil J Mehta (a1) (a2), Sujoy Roy (a3), Jacqueline Anne Johnson (a1), John Woodford (a1), Alexander Zinovev (a4), Zahirul Islam (a5), Ali Erdemir (a1), Sunil Sinha (a3), George Fenske (a1) and Barton Prorok (a2)...

Abstract

Carbon-based coatings exhibit many attractive properties that make them good candidates for a wide range of engineering applications. Tribological studies of the films have revealed a close correlation between the chemistry of the hydrocarbon source gases and the coefficients of friction and wear rates of the diamond-like carbon films. Those films grown in source gases with higher hydrogen-to-carbon ratios had much lower coefficients of friction and wear rates than did films derived from source gases with lower hydrogen-to-carbon ratios. The mechanism for this low friction is as yet not properly understood. Ongoing structural characterization of the films at Argonne National Laboratory is gradually revealing this mechanism. Recent studies have included x-ray photoelectron spectroscopy (XPS), near edge x-ray absorption fine structure (NEXAFS) and x-ray reflectivity (XRR). XPS showed ∼10% oxygen at the surface, which was largely removed after a 1 minute sputter; NEXAFS showed a high sp2:sp3 ratio implying a highly graphitic material; and XRR has given a comprehensive depth profile, with three layers of increasing density as the substrate was approached. The paper discusses the results and correlation with previous friction measurements.

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[1] Robertson, J., Materials Science and Engineering R 37, 129281 (2002)
[2] Erdemir, A., Tribology International 37, 577583 (2004)
[3] Erdermir, A., Eryilmaz, O. L., Nilufer, I. B., Fenske, G. R., Surface and Coatings Technology 133–134, 448454 (2000)
[4] Lenardi, C., Piseri, P., Briois, V., Milani, O., Journal of Applied Physics 85, 71597167 (2000)
[5] Johnson, J. A., Woodford, J. B., Chen, X., Anderson, J., Erdemir, A. and Fenske, G. R., Journal of Applied Physics 95, 77657771 (2004)
[6] Parratt, L.G., Physical Review 95, 359369 (1954)
[7] Zhang, Q., Yoon, S. F., Ahn, R. J., Yang, H., Journal of Applied Physics 86, 289296 (1999)
[8] Ferrari, A. C., Libassi, A.. Tanner, B. K., Stolojan, V., Yuan, J., Brown, L. M., Rodil, S. E., Kleinsorge, B. and Robertson, J., Physical Review B 62, 11 089- 11 103 (2000)
[9] Johnson, J. A., Woodford, J. B., Erdemir, A. and Fenske, G. R.. Applied Physics Letters, 83, 3, 452454 (2003)

X-Ray Studies of Near-Frictionless Carbon Films.

  • Nikhil J Mehta (a1) (a2), Sujoy Roy (a3), Jacqueline Anne Johnson (a1), John Woodford (a1), Alexander Zinovev (a4), Zahirul Islam (a5), Ali Erdemir (a1), Sunil Sinha (a3), George Fenske (a1) and Barton Prorok (a2)...

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