Structural determination of wear debris generated from sliding wear tests on ceramic coatings using Raman microscopy

CONSTABLE, C. P., YARWOOD, J., HOVSEPIAN, P. E., DONOHUE, L. A., LEWIS, D. B. and MUNZ, W. D. (2000). Structural determination of wear debris generated from sliding wear tests on ceramic coatings using Raman microscopy. Journal of Vacuum Science and Technology A, 18 (4), 1681-1689.

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Link to published version:: 10.1116/1.582407

Abstract

In order to address the important interest in wear debris and associated wear mechanisms, we have studied a series of physical-vapor deposition ceramic hard coatings (CrN/NbN, CrN, NbN, TiAlN/VN, and TiCN) using a ball-on-disk sliding configuration against corundum. The debris generated were characterized using Raman microscopy to identify compounds, especially oxides, generated during the wear process to gain a better understanding of tribochemical reactions. The high spatial resolution (2 mu m), sensitivity to structural changes, and nondestructive nature make this technique ideal for the study of such small amounts of wear debris. This article examines binary, multicomponent, multilayered, and superlattice coatings. Under dry sliding conditions of 5 N normal load and 10 cm/s speed, titanium-based alloy coatings were found to provide TiO2 (rutile) debris. However, the addition of thin layers of VN to the TiAlN system provided a lower friction coefficient, and much less debris through the possible formation of a lubricious surface oxide. CrN-and NbN-based coatings were also found to produce debris with Raman bands corresponding to oxides. Contact temperatures were also estimated by comparison of the tribochemical products generated during sliding wear with the formation temperatures of oxides detected from static oxidation. (C) 2000 American Vacuum,? Society. [S0734-2101(00)16604-7].

Item Type: Article
Additional Information: 46th National Symposium of the American-Vacuum-Society OCT 25-29, 1999 SEATTLE, WA Part 2
Research Institute, Centre or Group: Materials and Engineering Research Institute > Thin Films Research Centre > Nanotechnology Centre for PVD Research
Identification Number: 10.1116/1.582407
Depositing User: Ann Betterton
Date Deposited: 17 Feb 2010 15:46
Last Modified: 13 Sep 2010 14:37
URI: http://shura.shu.ac.uk/id/eprint/1105

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