Some quantitative aspects of ferrography
Abstract
Principles and application of quantitative ferrography are described, and the mechanisms of particle precipitation, quantification of the debris, linearity of response, and the efficiency and repeatability of the ferrograph are discussed in detail. Various severity-of-wear indices are investigated for both the analytical and the direct reading ferrograph and the respective applicability is illustrated with regards to gas turbulence, gearboxes, and diesel engines. The technique was found capable of detecting the onset of increased wear, and results show that the ferrograph can provide a means of determining the amount of wear debris in an oil sample and an indication of its size distribution. The response of the apparatus is not linear because of particle overlap and the efficiency of particle precipitation is affected by the presence of insoluble organic material in the oil.
- Publication:
-
Wear
- Pub Date:
- April 1981
- Bibcode:
- 1981Wear...67..287P
- Keywords:
-
- Ferrography;
- Lubricating Oils;
- Wear Tests;
- Debris;
- Particle Precipitation;
- Particle Size Distribution;
- Instrumentation and Photography