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The damping properties of dealloyed porous copper and its PMMA composite

Published online by Cambridge University Press:  03 March 2011

Un-Sig Min  and
James C.M. Li
Un-Sig Min
Affiliation:
Department of Mechanical Engineering, Materials Science Program, University of Rochester, Rochester, New York 14627-0133
James C.M. Li
Affiliation:
Department of Mechanical Engineering, Materials Science Program, University of Rochester, Rochester, New York 14627-0133
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Abstract

Incramute Cu-Mn alloys were dealloyed to remove Mn by selective electrolytic separation. The porous dealloyed specimens were compressed at 0.17-14 GPa, resulting in densities of 55-88% of the density of pure copper. Some porous copper specimens before compression were soaked in a mixture of monomer (MMA) and the initiator (AIBN), compressed, and then polymerized by heating. Young's moduli of both the dealloyed porous copper and its PMMA composite were found to decrease exponentially with porosity and volume fraction of PMMA, respectively. The apparent activation energy for damping of Cu-PMMA composite near the glass transition temperature of PMMA was found to increase with decreasing volume fraction of PMMA.

Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 11 , November 1994 , pp. 2884 - 2890
Copyright
Copyright © Materials Research Society 1994

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