Mechanism of Lubrication by Surrounding Gas Molecules in Adhesive Wear

[+] Author and Article Information
Norimune Soda

Institute of Physical and Chemical Research, Hirosawa, Wako-shi, Saitama, Japan

Tadashi Sasada

Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, Japan

J. of Lubrication Tech 100(4), 492-499 (Oct 01, 1978) (8 pages) doi:10.1115/1.3453261 History: Received May 12, 1978; Online October 20, 2010


To explain quantitatively the lubricating effect of gas molecules on adhesive wear, the authors have introduced a new concept of mean free time of a small contact point. When a bridge formed between two contact points is sheared off and a small clean surface is exposed to surrounding gases, it must have a free time t until it forms the next bridge when sliding. During this time t, the gas molecules attack the clean spot and can easily form a chemisorbed monolayer when the contact pressure p is low or when the sliding speed v is low. The authors have verified the fundamental relation between the mean free time t and the value pv, and have found that the critical transition point from the mild to severe wear corresponds to the condition where the mean free time of a sheared junction is just enough to be covered by the chemisorbed monolayer of surrounding gas molecules.

Copyright © 1978 by ASME
Your Session has timed out. Please sign back in to continue.





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