POLARIZED LIGHT MICROSCOPY AS A FILTER DEBRIS ANALYSIS TOOL

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Authors
  1. Fisher, G.C.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
The use of polarized light microscopy (PLM) as an analysis tool for lube oil filter debris examination is investigated. Reflectance PLM is shown to be able to discriminate between metallic wear particles and nonmetallic particles present in filter debris by differentiating optically isotropic versus anisotropic materials. The utility of transmittance PLM in identifying common nonmetallic materials in filter debris is also demonstrated. The identification is accomplished by estimation of the particle's refractive indices through a technique known as dispersion staining. That information, coupled with knowledge of the material's morphology, permits identification by comparison with literature references.
Keywords
FDA (Filter Debris Analysis)
Date of publication
01 May 1997
Number of Pages
14
DSTKIM No
97-03419
CANDIS No
503456
Format(s):
Hardcopy;Document Image stored on Optical Disk

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