Final published version
Licence: CC BY: Creative Commons Attribution 4.0 International License
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Electromagnetic and mechanical performance of 3D printed wave-shaped copper solid superstructures
AU - Sun, J.
AU - Tang, W.
AU - Wang, Y.
AU - Yao, X.
AU - Huang, B.
AU - Saafi, M.
AU - Wang, X.
PY - 2023/11/30
Y1 - 2023/11/30
N2 - The increasing concern over electromagnetic wave (EMW) contamination has led to the emergence of the EMW-absorbing superstructure element. Cementitious composites typically possess poor electromagnetic wave reflectivity, but this was improved through 3D printing technology, which offers greater productivity and design flexibility. In this study, a new wave-shaped EMW absorbing superstructure was manufactured using 3D cement printing, and mechanical testing showed a significant improvement in flexural and shearing strength. Molecular dynamic simulation was utilized to investigate the mechanism of the enhanced mechanical properties at the molecular scale. The EMW absorption performance of the printed specimens was analyzed from 1 GHz to 18 GHz through the Naval Research Laboratory (NRL) equipment, exhibiting a significant improvement in reflectance, especially in the low-frequency domain. Based on experimental results, the optimized design of the superstructure was proposed, which possesses an average reflection loss of −25 dB, a peak reflectivity of −37.4 dB, and an absorbing bandwidth of 17 GHz. These findings suggest that the 3D-printed EMW absorber element has great potential for use in minimizing electromagnetic contamination in various applications.
AB - The increasing concern over electromagnetic wave (EMW) contamination has led to the emergence of the EMW-absorbing superstructure element. Cementitious composites typically possess poor electromagnetic wave reflectivity, but this was improved through 3D printing technology, which offers greater productivity and design flexibility. In this study, a new wave-shaped EMW absorbing superstructure was manufactured using 3D cement printing, and mechanical testing showed a significant improvement in flexural and shearing strength. Molecular dynamic simulation was utilized to investigate the mechanism of the enhanced mechanical properties at the molecular scale. The EMW absorption performance of the printed specimens was analyzed from 1 GHz to 18 GHz through the Naval Research Laboratory (NRL) equipment, exhibiting a significant improvement in reflectance, especially in the low-frequency domain. Based on experimental results, the optimized design of the superstructure was proposed, which possesses an average reflection loss of −25 dB, a peak reflectivity of −37.4 dB, and an absorbing bandwidth of 17 GHz. These findings suggest that the 3D-printed EMW absorber element has great potential for use in minimizing electromagnetic contamination in various applications.
KW - 3D printing technology
KW - Electromagnetic wave absorption
KW - Molecular dynamic simulation
KW - Wave-shaped superstructure
U2 - 10.1016/j.jmrt.2023.11.116
DO - 10.1016/j.jmrt.2023.11.116
M3 - Journal article
VL - 27
SP - 6936
EP - 6946
JO - Journal of Materials Research and Technology
JF - Journal of Materials Research and Technology
SN - 2238-7854
ER -