Enhancement of mechanical properties of metamaterial absorber based on selective laser sintering and infiltration techniques

Release time:2020-06-18

Impact Factor:6.6

DOI number:10.1016/j.coco.2020.100373

Affiliation of Author(s):中南大学

Journal:Composites Communications

Key Words:Metamaterial absorber Mechanical properties Selective laser sintering Infiltration

Abstract:In this study, a 3D printing technology, selective laser sintering (SLS), and infiltration techniques were used to prepare a complex three-dimensional metamaterial absorber with high performance. The raw carbonyl iron (CI) powders were coated by polyamide12 (PA12), where the dissolution-precipitation method was used to improve their uniformity. The coated powders were then printed by SLS. The influence of laser power on the relative density of the composites was studied, where 18W was thought as the optimal laser power. And the SLS samples were infiltrated by thermosetting epoxy resin (EP, E−44) to increase their relative densities and strength. Mechanical tests showed that the infiltrated composites have an ultimate tensile strength of 41.98 MPa, almost 15 times higher than those without infiltration. The final metamaterial absorber (MMA) exhibited the reflection loss below −10 dB in 2.7–18 GHz. The above results indicate that the fabricated processes proposed in this paper have great potential for the preparation of three-dimensional metamaterial absorbers.

First Author:Y. Wen

Indexed by:Journal paper

Correspondence Author:C. Jiang

Discipline:Engineering

First-Level Discipline:Materials Science and Engineering

Document Type:J

Volume:21

Issue:100373

ISSN No.:2452-2139

Translation or Not:no

Date of Publication:2020-05-26

Included Journals:SCI

Links to published journals:https://www.sciencedirect.com/journal/composites-communications