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Science 26 February 1993:
Vol. 259. no. 5099, pp. 1305 - 1308
DOI: 10.1126/science.259.5099.1305
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Articles

Identification of a Second Dynamic State During Stick-Slip Motion

Hisae Yoshizawa 1, Patricia McGuiggan 1, and Jacob Israelachvili 1

1 Department of Chemical and Nuclear Engineering and Materials Department, University of California, Santa Barbara, CA 93106

Stick-slip, or interrupted, motion rather than smooth uninterrupted motion occurs in many different phenomena such as friction, fluid flow, material fracture and wear, sound generation, and sensory "texture." During stick-slip, a system is believed to undergo transitions between a static (solid-like) state and a kinetic (liquid-like) state. The stick-slip motion between various types of pretreated surfaces was measured, and a second, much more kinetic state that exhibits ultra-low friction was found. Transitions to and from this super-kinetic state also give rise to stick-slip motion but are fundamentally different from conventional static-kinetic transitions. The results here suggest practical conditions for the control of unwanted stick-slip and the attainment of ultra-low friction.

Submitted on June 29, 1992
Accepted on November 30, 1992


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
From Static to Kinetic Friction in Confined Liquid Films.
G. Reiter, A. L. Demirel, and S. Granick (1994)
Science 263, 1741-1744
   Abstract »    PDF »
On the Thermodynamic Stability of Confined Thin Films Under Shear.
D. J. Diestler, M. Schoen, and J. H. Cushman (1993)
Science 262, 545-547
   Abstract »    PDF »


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