Hostname: page-component-848d4c4894-2pzkn Total loading time: 0 Render date: 2024-05-26T11:05:52.039Z Has data issue: false hasContentIssue false

Studies on Wear Mechanism of Ultrathin Protective Carbon Overcoat by Micro-Wear Scan Technique

Published online by Cambridge University Press:  21 February 2011

T. W. Wu*
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120
Get access

Abstract

By combining the micro-wear and microscratch techniques in a microindenter, a new methodology to investigate the mechanical properties of ultrathin coatings has been developed. With a 0.18 μm/sec scratch speed along a Y-direction while oscillating the indenter tip along the X-direction at a 6.55 Hz frequency, uniform wear tracks of approximately 20 μm × 90 μm in dimension can be created under either a constant or a gradually increased applied normal load. The wear-scan methodology has rendered several immediate advantages over the conventional micro-scratch technique, offering features such as a much larger testing area thus facilitating the failure and morphology analyses afterwards, the possibility of studying the wear debris generation and the flexibility in testing characteristics. Two thin film disks with different hydrogenated carbon overcoats have been tested by using the micro-wear scan technique. The results in the mechanical measurements, the wear processes and the morphology evolution are illustrated and discussed.

Type
Research Article
Copyright
Copyright © Materials Research Society 1995

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Pethica, and Oliver, W.C., Mater. Soc. Symp. Proc. 130, 13 (1988).Google Scholar
2. Wu, T.W., Mater, J.. Chem. and Phys. 33, 15 (1993).Google Scholar
3. Wu, T.W., J. Mater. Res. 6, 407 (1991).Google Scholar
4. Field, J. and Swain, M.V., J. Mater. Res. 8, 297 (1993).Google Scholar
5. White, R.L., IBM Storage Systems Division, private communication.Google Scholar
6. Wu, T.W. and Lee, C.-K., J. Mater. Res. 9, 805 (1994)Google Scholar
7. Wu, T.W. and Lee, C.-K., J. Mater. Res. 9, 797 (1994)Google Scholar
8. Mathew Mate, C., Wear, 168, 17 (1993)Google Scholar
9. Teer, and Arnell, R.D., Principles of Tribology, edited by Hailing, J., (The MacMillan Press Ltd., 1978), p 72.Google Scholar