Fundamental mechanistic studies of friction and wear have long been a theme in the work of Dr. Irwin Singer.  This accompanies his interest in the role of interfacial layers, third bodies, and shear accommodation in solid lubricants.  The focus of this presentation is how contacting surfaces and subsurfaces change both structurally and chemically in order to accommodate interfacial shear in carbon and metal dichalcogenide-based solid lubricant coatings. It was determined that the coatings exhibit different velocity accommodation modes (VAM) of interfacial sliding and intrafilm shear, as determined by electron microscopy (3-D focused ion beam serial cross-sectioning, HAADF-STEM, and HRTEM with precession electron diffraction) and spectroscopy (Raman, Auger and EDS wear maps) techniques.  This presentation will also discuss routes to improve coatings for use in extreme operating environments, in which Dr. Singer has made seminal contributions.

Microstructural evolution during friction and wear of solid lubricant coatings

244th National Meeting (2012)

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