Abstract
Cyclotriphosphazene lubricants were synthesized and the relationship between their structure and tribological properties was investigated using an optimol SRV oscillating friction and wear tester and one-way reciprocating friction tester. The elemental composition and chemical nature of the antiwear films generated on steel surface were analyzed on a scanning electron microscope with a Kevex energy dispersive X-ray analyzer attachment (SEM-EDS) and X-ray photoelectron spectrometer (XPS). It was found that aryloxphosphazene with polar substituent as a lubricant of steel-steel and steel-aluminum pair gave low wear, while aryloxyphosphazene with nonpolar group on the phenyl pendant led to high wear. Phosphazene provides poor lubricity for the steel-aluminum system under low load (0.5-3 N). The XPS analytical results of the antiwear films generated on the steel and aluminum surface indicate that phosphazene reacted with steel or aluminum counterface and formed a surface protecting film consisting of fluoride and organic compounds containing O, C, F, N, and P during friction. This contributes to reduce the friction and wear of steel-aluminum system.
| Original language | English |
|---|---|
| Pages (from-to) | 394-400 |
| Number of pages | 7 |
| Journal | Wear |
| Volume | 252 |
| Issue number | 5-6 |
| DOIs | |
| State | Published - Mar 2002 |
| Externally published | Yes |
Keywords
- Lubricant
- Phosphazene
- SEM-EDS
- Tribological properties
- XPS