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Determination of Lubricants on Ball Bearings by FT-IR using an Integrating SphereThe lifetime determination of space lubricants is done at our facility by accelerated testing. Several micrograms of lubricant are deposited on the surface of a ball by syringing tens of micro liters of dilute lubricant solution. The solvent evaporates and the mass of lubricant is determined by twenty weighings near the balance reliability limit. This process is timely but does not produce a good correlation between the mass of lubricant and the volume of solution applied, as would be expected. The amount of lubricant deposited on a ball can be determined directly by Fourier Transform - Infrared Spectroscopy using an integrating sphere. In this paper, we discuss reasons for choosing this methodology, optimization of quantification conditions and potential applications for the technique. The volume of lubricant solution applied to the ball gives better correlation to the IR intensity than does the weight.
Document ID
Document Type
Conference Paper
Street, K. W.
(NASA Glenn Research Center Cleveland, OH, United States)
Pepper, S. V.
(NASA Glenn Research Center Cleveland, OH, United States)
Wright, A.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 23, 2013
Publication Date
March 31, 2003
Subject Category
Mechanical Engineering
Meeting Information
Meeting: Society of Tribologists and Lubrication Engineers Annual Meeting
Location: New York, NY
Country: United States
Start Date: April 29, 2003
Sponsors: Society of Tribologists and Lubrication Engineers
Distribution Limits
Work of the US Gov. Public Use Permitted.

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