Abstract
We demonstrate that micro-scale rolling bearings exhibit friction and wear properties markedly different from their macro-scale counterparts. A microfabricated testing platform uses variable rolling element diameters or vapor-phase lubricated interfaces to independently test friction force with varying contact area and surface energy. A linear, consistent, relationship between friction force and contact area is observed among different rolling element diameters. When surface free energy is altered through the introduction of vapor-phase lubrication, an 83 % decrease in friction is observed. When coupled with observed ball material adhered to the raceway, there is strong evidence for adhesion-dominated rolling friction regime at the micro-scale.
Similar content being viewed by others
References
Eldredge, K.R., Tabor, D.: The mechanism of rolling friction. I. The plastic range. Proc. Royal Soc. A 229(1177), 181–198 (1955). doi:10.1098/rspa.1955.0081
Tabor, D.: The mechanism of rolling friction. II. The elastic range. Proc. Royal Soc. A 229(1177), 198–220 (1955). doi:10.1098/rspa.1955.0082
Tabor, D.: Elastic work involved in rolling a sphere on another surface. Brit. J. Appl. Phys. 6, 79–81 (1955)
Mehregany, M., Senturia, S.D., Lang, J.H.: Friction and wear in microfabricated harmonic side-drive motors. In: IEEE (ed.) Solid-State Sensor and Actuator Workshop, 1990. 4th Technical Digest., IEEE, Hilton Head, SC, 4-7 Jun 1990 (1990), pp. 17–22. Transducers Research Foundation
Yoxall, B.E., Chan, M.L., Harake, R.S., Pan, T.R., Horsley, D.A.: Rotary liquid droplet microbearing. J. Microelectromech. Syst. 21(3), 721–729 (2012). doi:10.1109/jmems.2012.2185218
Chan, M.L., Yoxall, B., Park, H., Kang, Z.Y., Izyumin, I., Chou, J., Megens, M.M., Wu, M.C., Boser, B.E., Horsley, D.A.: Design and characterization of MEMS micromotor supported on low friction liquid bearing. Sens. Actuators A Phys. 177, 1–9 (2012). doi:10.1016/j.sna.2011.08.003
Frechette, L.G., Jacobson, S.A., Breuer, K.S., Ehrich, F.F., Ghodssi, R., Khanna, R., Wong, C.W., Zhang, X., Schmidt, M.A., Epstein, A.H.: High-speed microfabricated silicon turbomachinery and fluid film bearings. J. Microelectromech. Syst. 14(1), 141–152 (2005). doi:10.1109/jmemes.2004.839008
Ghodssi, R., Hanrahan, B., Beyaz, M.: Microball bearing technology for MEMS devices and integrated microsystems. In: IEEE (ed.) 16th International Conference on Solid-State Sensors, Actuators, and Microsystems (Transducers 2011), Beijing, China, June 5-9, (2011), pp. 1789–1794
Waits, C.M., McCarthy, M., Ghodssi, R.: A microfabricated spiral-groove turbopump supported on microball bearings. J. Microelectromech. Syst. 19(1), 99–109 (2010)
Waits, C.M.: A low-wear planar-contact silicon raceway for microball bearing applications. In: U.S. Army Research Laboratory Technical Report, ARL-TR-4796. vol. ARL-TR-4796 (2009)
Ghalichechian, N., Modafe, A., Lang, J.H., Ghodssi, R.: Dynamic characterization of a linear electrostatic micromotor supported on microball bearings. Sens. Actuators A Phys. 136(2), 496–503 (2007)
Ghalichechian, N., Modafe, A., Beyaz, M.I., Ghodssi, R.: Design, fabrication, and characterization of a rotary micromotor supported on microball bearings. J. Microelectromech. Syst. 17(3), 632–642 (2008)
Naruse, Y., Matsubara, N., Mabuchi, K., Izumi, M., Suzuki, S.: Electrostatic micro power generation from low-frequency vibration such as human motion. J. Micromech. Microeng. 19(9), 094002 (2009)
McCarthy, M., Waits, C.M., Ghodssi, R.: Dynamic friction and wear in a planar-contact encapsulated microball bearing using an integrated microturbine. J. Microelectromech. Syst. 18(2), 263–273 (2009)
McCarthy, M., Waits, C.M., Beyaz, M.I., Ghodssi, R.: A rotary microactuator supported on encapsulated microball bearings using an electro-pneumatic thrust balance. J. Micromech. Microeng. 19(9), 094007 (2009)
Hertz, H.: On the contact of rigid elastic solids. Gesammelte Weke 1, 155–195 (1895)
Kendall, K.: Rolling friction and adhesion between smooth solids. Wear 33(2), 351–358 (1975)
Johnson, K.L.: Mechanics of adhesion. Tribol. Int. 31, 413–418 (1999)
Asay, D.B., Kim, S.H.: Effects of adsorbed water layer structure on adhesion force of silicon oxide nanoasperity contact in humid ambient. J. Chem. Phys. 124(17), 174712 (2006). doi:10.1063/1.2192510
Asay, D.B., Dugger, M.T., Ohlhausen, J.A., Kim, S.H.: Macro- to nanoscale wear prevention via molecular adsorption. Langmuir 24(1), 155–159 (2007). doi:10.1021/la702598g
Asay, D., Dugger, M., Kim, S.: In-situ vapor-phase lubrication of MEMS. Tribol. Lett. 29(1), 67–74 (2008). doi:10.1007/s11249-007-9283-0
Jones, R., Pollock, H.M., Cleaver, J., Hodges, C.: Adhesion forces between glass and silicon surfaces in air studied by AFM: Effects of relative humidity, particle size, roughness, and surface treatment. Langmuir 18, 8045–8055 (2002)
T. A. Stolarski, S.T.: Rolling contacts. Tribology in practice series. Professional engineering publications, (2001)
Acknowledgments
This work was supported by the U.S. National Science Foundation under award no. 0901411. We would also like to acknowledge the Maryland Nanocenter and the U.S. Army Research Laboratory Cleanroom Staff.
Author information
Authors and Affiliations
Corresponding author
Additional information
Brendan M. Hanrahan was formerly with Materials Science and Engineering Department, University of Maryland, College Park, College Park, MD, 20704, USA.
Electronic supplementary material
Below is the link to the electronic supplementary material.
Rights and permissions
About this article
Cite this article
Hanrahan, B.M., Misra, S., Beyaz, M.I. et al. An Adhesion-Dominated Rolling Friction Regime Unique to Micro-scale Ball Bearings. Tribol Lett 56, 215–221 (2014). https://doi.org/10.1007/s11249-014-0401-5
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11249-014-0401-5