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Dynamics of solid lubrication as observed by optical microscopyA bench metallograph was converted into a micro contact imager by the addition of a tribometer employing a steel ball in sliding contact with a glass disk. The sliding contact was viewed in real time by means of projection microscope optics. The dynamics of abrasive particles and of solid lubricant particles within the contact were observed in detail. The contact was characterized by a constantly changing pattern of elastic strain with the passage of surface discontinuities and solid particles. Abrasive particles fragmented upon entering the contact, embedded in one surface and scratched the other; in contrast, the solid lubricant particles flowed plastically into thin films. The rheological behavior of the lubricating solids gave every appearance of a paste-like consistency within the Hertzian contact.
Document ID
19760020481
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sliney, H. E. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1976
Subject Category
Mechanical Engineering
Report/Patent Number
E-8653
NASA-TM-X-71880
Meeting Information
Meeting: Joint Lubrication Conf.
Location: Boston, MA
Country: United States
Start Date: October 5, 1976
End Date: October 7, 1976
Sponsors: Am. Soc. of Mech. Engineers, Am. Soc. of Lubrication Engineers
Accession Number
76N27569
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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