Abstract
X-ray Absorption Near Edge Structure (XANES) has been used to characterize the chemistry of tribochemical wear pads generated from a paraffinic base oil with a zinc-dialkyl-dithiophosphate additive on steel surfaces and high-velocity oxygen fuel (HVOF) thermal spray coatings. The phosphorus K- and L- edge XANES spectra show that the tribofilms formed on steel and the HVOF coatings have the same chemical nature. Also, mechanical properties of these tribofilms were examined by nanoindentation techniques using both Hysitron and Interfacial Force Microscopy (IFM) instruments. The elastic moduli extracted from indentation force-displacement (f-d) curves have demonstrated that tribofilms on steel and HVOF coatings have similar surface topography and mechanical properties.
| Original language | English |
|---|---|
| Pages (from-to) | 241-248 |
| Number of pages | 8 |
| Journal | Tribology Letters |
| Volume | 15 |
| Issue number | 3 |
| DOIs | |
| State | Published - Oct 2003 |
Bibliographical note
Funding Information:The authors would like to thank Larry Byrnes and Martin Krammer of GM Powertrain for supplying the HVOF samples and for many helpful discussions. We are also grateful to Jan Herbst for his valuable comments on this manuscript. Useful discussions with Claire McCague and Milan Kovar are also gratefully acknowledged. The authors are grateful to the staff at the Canadian Synchrotron Radiation Facility (CSRF) and to the staff of the Synchrotron Radiation Centre (SRC), University of Wisconsin, Madison, for their technical support. We are grateful to the National Science Foundation (NSF) for supporting the SRC under Award #DMR-95-31009. Financial support was provided by General Motors of Canada Ltd. and NSERC.
Keywords
- Antiwear films
- Nanoindentation
- Nanomechanical properties
- Nanotribology
- Polyphosphate
- XANES
- ZDDP
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Surfaces and Interfaces
- Surfaces, Coatings and Films