0
TECHNICAL PAPERS

Friction Measurements of Ultra-Thin Carbon Overcoats in Air

[+] Author and Article Information
P. M. McGuiggan, S. M. Hsu

Ceramics Division, National Institute of Standards and Technology, Gaithersburg, MD 20899

W. Fong, D. Bogy

U. C. Berkeley, Computer Mechanics Lab, Berkeley, CA 94702

C. S. Bhatia

Storage Systems Division, IBM Corporation, San Jose, CA 95193

J. Tribol 124(2), 239-244 (Dec 14, 1999) (6 pages) doi:10.1115/1.1387035 History: Received December 14, 1999; Received October 31, 2000
Copyright © 2002 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Measured contact area as a function of load for sputtered carbon films on mica. The triangles, squares and circles represent measurements at 0 percent relative humidity, 33 percent relative humidity, and 100 percent relative humidity, respectively. The solid line is a least squares fit of the data. The error bars indicate estimated standard uncertainties.
Grahic Jump Location
Lateral Force versus contact area for sputtered carbon films on mica. The open symbols represent measurements in the forward direction whereas the closed symbols represent measurements in the reverse direction. Measurements are shown for 0 percent relative humidity (triangles), 33 percent relative humidity (squares) and 100 percent relative humidity (circles). Both the friction values and the contact areas have an estimated relative standard uncertainty of ±10 percent of the measured values. The solid line is a linear regression fit to the data. The slope of the lines give the shear stress, τ, which clearly decreases as the humidity increases.
Grahic Jump Location
Shear Stress (Friction/Area) versus pressure (Load/Area) for sputtered carbon films on mica measured at 0 percent relative humidity (triangles), 33 percent relative humidity (squares), and 100 percent relative humidity (circles). The shear stress and pressure have an estimated relative standard uncertainty of ±20 percent and ±15 percent of the measured values, respectively. The solid line is a linear regression fit to the data.
Grahic Jump Location
Measurements of the lateral force versus applied load for one carbon coated surface sliding on one uncoated mica surface. The solid line is a least squares fit to the data. The solid circles represent measurements before the surfaces damaged, whereas the open circles represent measurements taken while sliding on wear debris. The error bars indicate estimated standard uncertainties. The damage occurred near 20 mN.

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In