The Proceedings of the Materials and Mechanics Conference
Online ISSN : 2424-2845
2022
Session ID : OS0824
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Control of Metal/Polymer Adhesion Strength by Metal Surface Structure for Sustainable Society
*Koki KASAIMasaki OMIYAJiwang YAN
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Abstract

The relationship between the shear strength of the metal-resin and the periodic structure of the metal surface was investigated. Femtosecond laser processing was applied to the Cr-plated carbon tool steel surface to form irregularities with a pitch of about 20 μm and a depth of about 10 μm, and a nano-scale fine periodic structure (so-called LIPSS) was formed on the top of the peaks. The epoxy resin was then placed in a mold and pressed by a heat press onto a metal plate. Then, the molded epoxy resin was pressed from the side with an indenter to measure the shear force, and the shear strength define as the maximum shear force. As a result, a positive correlation was observed between the shear strength and the opening valley angle of the micro-periodic structure, and a negative correlation was observed between the shear strength and the aspect ratio, which is the depth of the micro-periodic structure divided by the pitch.

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© 2022 The Japan Society of Mechanical Engineers
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