The origin of ultrasound-induced friction reduction in microscopic mechanical contacts.
We present a study of the origin of ultrasound-induced friction reduction in microscopic mechanical contacts. The effect of friction reduction caused by Rayleigh-type surface acoustic waves (SAWs) is demonstrated for propagating and two-dimensional, standing wave fields using lateral force microscop...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
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2002
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| _version_ | 1826287898555580416 |
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| author | Hesjedal, T Behme, G |
| author_facet | Hesjedal, T Behme, G |
| author_sort | Hesjedal, T |
| collection | OXFORD |
| description | We present a study of the origin of ultrasound-induced friction reduction in microscopic mechanical contacts. The effect of friction reduction caused by Rayleigh-type surface acoustic waves (SAWs) is demonstrated for propagating and two-dimensional, standing wave fields using lateral force microscopy (LFM). It is shown that with increasing wave amplitude, friction is completely suppressed. To detect and distinguish between the effect of lateral and vertical surface oscillation components on the cantilever movement, we employed multimode scanning acoustic force microscopy (SAFM). We found that the friction reduction effect is only due to the vertical oscillation component. Because this effect does not appear for purely in-plane polarized Love waves, we concluded that the mechanical diode effect is most probably responsible for the SAW-induced lubrication. This explanation is also supported by vertical and longitudinal SAFM measurements, which show that, in areas where friction is completely suppressed, low frequency vertical cantilever oscillations can still be observed, whereas lateral or torsional oscillations are no longer excited. |
| first_indexed | 2024-03-07T02:05:35Z |
| format | Journal article |
| id | oxford-uuid:9ee5d1e9-244e-4c94-94a7-76f5e46d7661 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:05:35Z |
| publishDate | 2002 |
| record_format | dspace |
| spelling | oxford-uuid:9ee5d1e9-244e-4c94-94a7-76f5e46d76612022-03-27T00:53:21ZThe origin of ultrasound-induced friction reduction in microscopic mechanical contacts.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:9ee5d1e9-244e-4c94-94a7-76f5e46d7661EnglishSymplectic Elements at Oxford2002Hesjedal, TBehme, GWe present a study of the origin of ultrasound-induced friction reduction in microscopic mechanical contacts. The effect of friction reduction caused by Rayleigh-type surface acoustic waves (SAWs) is demonstrated for propagating and two-dimensional, standing wave fields using lateral force microscopy (LFM). It is shown that with increasing wave amplitude, friction is completely suppressed. To detect and distinguish between the effect of lateral and vertical surface oscillation components on the cantilever movement, we employed multimode scanning acoustic force microscopy (SAFM). We found that the friction reduction effect is only due to the vertical oscillation component. Because this effect does not appear for purely in-plane polarized Love waves, we concluded that the mechanical diode effect is most probably responsible for the SAW-induced lubrication. This explanation is also supported by vertical and longitudinal SAFM measurements, which show that, in areas where friction is completely suppressed, low frequency vertical cantilever oscillations can still be observed, whereas lateral or torsional oscillations are no longer excited. |
| spellingShingle | Hesjedal, T Behme, G The origin of ultrasound-induced friction reduction in microscopic mechanical contacts. |
| title | The origin of ultrasound-induced friction reduction in microscopic mechanical contacts. |
| title_full | The origin of ultrasound-induced friction reduction in microscopic mechanical contacts. |
| title_fullStr | The origin of ultrasound-induced friction reduction in microscopic mechanical contacts. |
| title_full_unstemmed | The origin of ultrasound-induced friction reduction in microscopic mechanical contacts. |
| title_short | The origin of ultrasound-induced friction reduction in microscopic mechanical contacts. |
| title_sort | origin of ultrasound induced friction reduction in microscopic mechanical contacts |
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