TY - JOUR
T1 - 3D-printed oblique honeycomb Al2O3/SiCw structure for electromagnetic wave absorption
AU - Mei, Hui
AU - Zhao, Xing
AU - Zhou, Shixiang
AU - Han, Daoyang
AU - Xiao, Shanshan
AU - Cheng, Laifei
N1 - Publisher Copyright:
© 2019
PY - 2019/9/15
Y1 - 2019/9/15
N2 - For electromagnetic wave (EMW) absorption materials, combining microstructure design with macrostructure design is considered as an effective means to adjust EMW absorption performance. Undoubtedly, the great advantages of three-dimensional (3D) printing technology in structural design and accurate molding provide a convenient and feasible research scheme for the adjustment of EMW absorption performance. In this study, a method combined 3D printing technology with direct chemical vapor infiltration (CVI) has been adopted to fabricate Al2O3/SiC whisker (SiCw) honeycomb composites. The porous oblique honeycomb structures with well-designed angle (30°, 45°, 60° and 75°) and micron-scale SiCw effectively improved impedance match, inner scattering and dielectric loss, which resulted in the realization of the optimized wave absorbing composites. Specially, Al2O3/SiCw composite with the angle of 30° shows a minimum reflection coefficient (RCmin) value of −63.65 dB (99.9999%) absorption at 9.8 GHz with a thickness of 3.5 mm while the effective absorption bandwidth (EAB) ranges from 8.2 to 12.4 GHz, covering the whole X band. Besides, the EMW absorption mechanism for 3D printed Al2O3/SiCw composite is also discussed. As a proof of concept, this strategy provides a novel and effective avenue to fabricate structural composites with broader and higher microwave absorption performance.
AB - For electromagnetic wave (EMW) absorption materials, combining microstructure design with macrostructure design is considered as an effective means to adjust EMW absorption performance. Undoubtedly, the great advantages of three-dimensional (3D) printing technology in structural design and accurate molding provide a convenient and feasible research scheme for the adjustment of EMW absorption performance. In this study, a method combined 3D printing technology with direct chemical vapor infiltration (CVI) has been adopted to fabricate Al2O3/SiC whisker (SiCw) honeycomb composites. The porous oblique honeycomb structures with well-designed angle (30°, 45°, 60° and 75°) and micron-scale SiCw effectively improved impedance match, inner scattering and dielectric loss, which resulted in the realization of the optimized wave absorbing composites. Specially, Al2O3/SiCw composite with the angle of 30° shows a minimum reflection coefficient (RCmin) value of −63.65 dB (99.9999%) absorption at 9.8 GHz with a thickness of 3.5 mm while the effective absorption bandwidth (EAB) ranges from 8.2 to 12.4 GHz, covering the whole X band. Besides, the EMW absorption mechanism for 3D printed Al2O3/SiCw composite is also discussed. As a proof of concept, this strategy provides a novel and effective avenue to fabricate structural composites with broader and higher microwave absorption performance.
KW - 3D printed AlO
KW - Electromagnetic wave absorption
KW - Honeycomb structure
KW - SiC whisker
UR - http://www.scopus.com/inward/record.url?scp=85065084381&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2019.05.011
DO - 10.1016/j.cej.2019.05.011
M3 - 文章
AN - SCOPUS:85065084381
SN - 1385-8947
VL - 372
SP - 940
EP - 945
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -