Abstract
Surface pattern is expected the following effects in friction, such as generating dynamic pressure, supplying and preserving lubricate on oil and trapping wear particles. One of the authors has developed the nanostripe surface having nano-scale groove array that was formed by depositing two kinds of materials on micro-scale slope array and by polishing the surface. This report describes a method of fabricating irregular nano-scale grooves formed on a substrate having random asperities. The random asperities were fabricated on a stainless steel substrate by shot blast processing. Then friction tests were carried out using pin-on-plate type friction tester driven by a PZT actuator with magnification mechanism. The result showed that the friction coefficient of random nanostripe surface was lower than that of untextured surface in the boundary to mixed lubrication regime.
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