Tribological Performance of Mechanically Textured Solid Lubricant Reservoir Tribosystems

Solid lubricant reservoirs (SLRs) with specific geometry are fabricated on different slider pads by employing the mechanical micromachining process. Molybdenum disulfide (MoS2) powder lubricants were used as the solid lubricant reservoir (SLR) material. A slider arm, which holds the slider pad in place, measures the tribological performance of each slider pad. Volumetric Fractional Coverage (VFC) model is currently being adapted to predict the tribological behavior of the system. mechanically textured solid lubricant reservoir
PFTL Research Assistant(s):   Randyka Pudjoprawoto; Dan Cardena; Patrick S. M. Dougherty
MMDL Researcher(s):   Recep Onler, Professor Burak Ozdoganlar
Method(s) Employed:   slider-on-disk with pellet tribometry; in situ data acquisition, optical interferometry, micromachining
Rig(s) and/or Software(s) Employed:   In-house slider-on-disk with pellet tribometer, Zygo New-View 7300 Optical Interferometer, Five-axis miniature machine tool
Collaborator(s):   Multiscale Micromachining and Dynamics Laboratory

Sample Results:

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Select PFTL References:

1.) Higgs III, C. F., and E. Y. A. Wornyoh. "An in situ mechanism for self-replenishing powder transfer films: experiments and modeling." Wear 264, no. 1 (2008): 131-138.

2.) Wornyoh, E. Y. A., & Higgs, C. F. (2011). An asperity-based fractional coverage model for transfer films on a tribological surface. Wear, 270(3), 127-139.

3.) Pudjoprawoto, R., Dougherty, P., Higgs III, C.F. "A Volumetric Fractional Coverage Model to Predict Frictional Behavior for In Situ Transfer Film Lubrication." Journal of Wear, July, 2013.