TY - JOUR
T1 - Sandwich structured SiCf/Si3N4 composite with discontinuous absorption attenuating layer for temperature-insensitive and broadband microwave absorption
AU - Cao, Yuchen
AU - Ye, Fang
AU - Zhou, Qian
AU - Liang, Jie
AU - Mo, Ran
AU - Fan, Xiaomeng
AU - Xue, Jimei
N1 - Publisher Copyright:
© 2025 Elsevier Ltd
PY - 2025/9
Y1 - 2025/9
N2 - Achieving temperature-insensitive microwave absorption (MA) over a wide temperature range is an immensely challenging task due to the inherent variations in electromagnetic response and energy conversion characteristics. Herein, we present a novel silicon carbide fiber-reinforced ceramic matrix composite (CMC) with a structural-functional-integrated design based on the absorption attenuation layer concept. Through a comprehensive exploration utilizing complementary experimental and computational techniques, we systematically analyze the relationship between key structural parameters of the absorption attenuation layer and microwave absorption characteristics. The results demonstrate that the sandwich-structured SiCf/Si3N4 exhibits exceptional broadband radar wave absorbing properties. Notably, the incorporation of a discontinuous periodic structure within the absorption attenuation layer markedly improves its absorbing capabilities. The experimental findings demonstrate that the discontinuous sandwich-structured SiCf/Si3N4 achieves an effective absorption bandwidth (EAB) of 11.4 GHz (6.6–18 GHz) at a thickness of 3.9 mm, corresponding to a reflection loss of ≤ -10 dB. Furthermore, due to the unique scattering and interference cancellation effects of the metastructure, DSS-SiCf/Si3N4 exhibits temperature-insensitive electromagnetic performance under elevated temperatures. Importantly, the EAB and average reflection loss of the composite remain essentially unchanged even when the temperature is elevated to 600 °C. This work provides a significant advancement in the design of “thinner, wider, stronger, and temperature-insensitive” microwave absorption components with practical applications.
AB - Achieving temperature-insensitive microwave absorption (MA) over a wide temperature range is an immensely challenging task due to the inherent variations in electromagnetic response and energy conversion characteristics. Herein, we present a novel silicon carbide fiber-reinforced ceramic matrix composite (CMC) with a structural-functional-integrated design based on the absorption attenuation layer concept. Through a comprehensive exploration utilizing complementary experimental and computational techniques, we systematically analyze the relationship between key structural parameters of the absorption attenuation layer and microwave absorption characteristics. The results demonstrate that the sandwich-structured SiCf/Si3N4 exhibits exceptional broadband radar wave absorbing properties. Notably, the incorporation of a discontinuous periodic structure within the absorption attenuation layer markedly improves its absorbing capabilities. The experimental findings demonstrate that the discontinuous sandwich-structured SiCf/Si3N4 achieves an effective absorption bandwidth (EAB) of 11.4 GHz (6.6–18 GHz) at a thickness of 3.9 mm, corresponding to a reflection loss of ≤ -10 dB. Furthermore, due to the unique scattering and interference cancellation effects of the metastructure, DSS-SiCf/Si3N4 exhibits temperature-insensitive electromagnetic performance under elevated temperatures. Importantly, the EAB and average reflection loss of the composite remain essentially unchanged even when the temperature is elevated to 600 °C. This work provides a significant advancement in the design of “thinner, wider, stronger, and temperature-insensitive” microwave absorption components with practical applications.
KW - Broadband microwave absorption
KW - High temperature microwave absorption
KW - SiC fiber reinforced ceramic matrix composite
KW - Temperature-insensitive microwave absorption
UR - http://www.scopus.com/inward/record.url?scp=105005409676&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2025.112618
DO - 10.1016/j.compositesb.2025.112618
M3 - 文章
AN - SCOPUS:105005409676
SN - 1359-8368
VL - 304
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
M1 - 112618
ER -