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Mechanical properties and damping properties of carbon nanotube-reinforced foam aluminum with small aperture

Published online by Cambridge University Press:  23 June 2020

Mingying Chen ,
Bowen Liu ,
Zhen Ji ,
Chengchang Jia ,
Qiuchi Wu  and
Zhe Liu
Mingying Chen
Affiliation:
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing100083, China
Bowen Liu
Affiliation:
Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing100083, China
Zhen Ji*
Affiliation:
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing100083, China
Chengchang Jia
Affiliation:
Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing100083, China
Qiuchi Wu
Affiliation:
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing100083, China
Zhe Liu
Affiliation:
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing100083, China
*
a)Address all correspondence to this author. e-mail: jizhen@mater.ustb.edu.cn
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Abstract

In this paper, CNTs reinforced foam aluminum matrix composites with small pore diameter were prepared by powder metallurgy method. When the mass fraction of CNTs was 0.75%, the tensile strength, flexural strength and compressive yield strength of the materials were 3.4 times, 2.4 times and 2.4 times of pure foam aluminum, respectively, reaching the maximum value, which obviously improved the mechanical properties of aluminum foam. The tensile property model of foam aluminum matrix composites was built to predict the properties of the composites, and the effects of defects and reinforcement on the mechanical properties of the composites were compared. The results show that the tensile fitting is consistent with the measured results when the mass fraction of CNTs is less than 0.75%, but the weakening effect of defects on the strength of aluminum foam is much greater than the enhancement of CNTs. With the increase of CNTs mass fraction, the damping loss factor of foam aluminum composites increases, dislocation damping and grain boundary damping play a role in advance, and the damping peak moves to the low temperature region.

Keywords

CNTs/foam aluminummechanical propertiesdamping performance
Type
Article
Information
Journal of Materials Research , Volume 35 , Issue 19: Focus Issue: Porous Metals: From Nano to Macro , 14 October 2020 , pp. 2567 - 2574
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Copyright
Copyright © Materials Research Society 2020

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Footnotes

b)

These authors contributed equal

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