Precision friction measurement between ultrathin wire and microprobe |
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Authors: | M.A. Salam AkandaAuthor Vitae H. TohmyohAuthor VitaeM. SakaAuthor Vitae |
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Affiliation: | Department of Nanomechanics, Tohoku University, Aoba 6-6-01, Aramaki, Aoba-ku, Sendai 980-8579, Japan |
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Abstract: | In this study, using an experimental technique based on small-span bending, the friction behaviors of ultrathin Pt wires with the tungsten microprobes have been reported. In the technique, friction force for sliding of a simply supported wire under bending load applied by closely positioned two opposite probes is measured by a microforce sensor. The force sensor is a capacitive detection type double-beam passive cantilever. Specificity of the microforce sensor provides the technological advantage for precise measurement of friction and normal contact forces sequentially under the observation by a high-resolution digital microscope. Static and kinetic frictions due to externally applied force, internal adhesive force and relative motion are successfully determined. Furthermore, the measured friction in wire-probe contact is used in the determination of the mechanical properties of the wire material. |
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Keywords: | Microforce Friction coefficient Ultrathin wire Microprobe Static and kinetic frictions Bending test |
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