Accession Number:

ADA250088

Title:

Surface Analysis of Stainless Steel Outer Race Bearing Specimens

Descriptive Note:

Final rept.,

Corporate Author:

MARTIN MARIETTA LABS BALTIMORE MD

Personal Author(s):

Report Date:

1991-10-01

Pagination or Media Count:

36.0

Abstract:

The results of analysis of R-4 stainless steel instrument bearings, subjected to various wear cycles, are reported to describe the fate of a synthetic Schiff base lubricant additive at the bearing wear track surfaces. The surfaces were monitored by x-ray, photoelectron spectroscopy XPS, and Fourier infrared FTIR spectroscopy to characterize all lubricant and grease species of interest. The data indicate a general modification or degradation of both the lubricant and ubiquitous fluorinated grease Kryto-x additive during the wear stages. Chemical and structural compositions are described for residual derivatives at the bearing track surfaces. Further studies are recommended that will enable Confirmation of both the chemical fate and the molecular mechanism of lubricant additives candidates.

Subject Categories:

  • Metallurgy and Metallography
  • Plastics
  • Machinery and Tools

Distribution Statement:

APPROVED FOR PUBLIC RELEASE