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Abstract
The porosity which is used as a starting point for the present study is the porosity acquired by a sulfuration treatment in a melted salts bath, on a soft steel surface (0.1 percent carbon). Examination of the porosity of the surface and subsurface layers is made, using a scanning electron microscope. Communicating pores (open porosity) in the range 0.2 to 2 microns can be seen.
Partial filling with PTFE is obtained by vaporizing an adequate aerosol and subsequent heating of the sample. The degree of penetration of the polymer is assessed with the help of the same scanning electron microscope, having an X-ray analyser incorporated.
Very interesting tribological properties have been communicated in this way to the surface and subsurface layers: they are not only antiseizure, but they can creep and deform under very high friction pressure without any modification in their metallurgical structure, the PTFE film remaining unchanged.
Presented at the first ASLE International Conference on Solid Lubrication held in Denver, Colorado, August 24–27, 1971
Notes
Presented at the first ASLE International Conference on Solid Lubrication held in Denver, Colorado, August 24–27, 1971
