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NANOTRIBOLOGY

NANOTRIBOLOGY. Feb. 28, 2006 Warren Courtney. Reasons to study nanotribology. To clarify our understanding of macroscopic friction effects Estimated saving >$100 billion year in N. America if improvements in machinery wear can be reduced

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NANOTRIBOLOGY

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  1. NANOTRIBOLOGY Feb. 28, 2006 Warren Courtney

  2. Reasons to study nanotribology • To clarify our understanding of macroscopic friction effects • Estimated saving >$100 billion year in N. America if improvements in machinery wear can be reduced • Reduction in use of energy and materials if friction can be reduced • To understand the friction and wear of magnetic storage devices if target of 1 terabit/6.5 cm2 density and fast download is to be achievable

  3. Device for scanning tip tribology • Scanning tip usually Si3N4, or Natural Diamond

  4. RETURN TO TOMLINSON MODEL Scan of friction loop generated by a scanning tip moving over a sodium chloride crystal

  5. Difference in Nanoscale measurement where tip size affects the coefficient of friction as opposed to cof being a property of two surfaces • Figure 1: Effect of tip sizes on friction.

  6. EFFECTS OF SURFACE CONTACT

  7. REFERENCES • www.mat.ethz.ch/research/tribology/nanotribology/ • http://physicsweb.org/articles/world/18/2 • grove.ufl.edu/~wgsawyer/MURI/MURI.html • Bhuushan, B.Handbook of micro/Nano tribology CRC Press, 1995 • www.pacificnanotech.com/nanotribology_lubricant-studies.html • www.vide.org/evc9/abstracts/pdf/11%20bushan.pdf

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