Multilaminate metastructure for high-temperature radar-infrared bi-stealth: Topological optimization and near-room-temperature synthesis

•Multidimensional topological optimization design•Preparation of high-temperature-resistant ceramic fiber paper•Radar-infrared multispectrum stealth performance metastructure•Near-room-temperature integration molding In the development aerospace technology, a multifunctional technology compatible with infrared and radar is one most feasible ways to improve survival military equipment under high-temperature conditions. However, it difficult effectively integrate multiple functions into material owing contradictory mechanisms radar. Herein, near-room-temperature integrated preparation hierarchical metastructure resistance, broadband microwave absorption, realized by combining papermaking method. It integrates an impedance-matching layer, pattern-resistant film, thermal insulation, which realizes control. This study provides new inspiration insights structures. 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Finally, (over 1,000°C) through process. scattering layer skeleton load-bearing give full play functional synergy levels. By virtue advantages, believed will field basic science, high-tech fields As four great inventions ancient China, played vital role civilization. Many studies demonstrated paper-based best flexibility, they terrible temperatures. Based facts, premise keeping simple efficient, inorganic silica paper. following final product shown Figure 1. our as-prepared overcomes above-mentioned problems achieves multifunctionality. attributed reasons: (1) fumed flame retardancy properties. inherits raw brilliant nonflammability (Video S1). (2) using concepts concrete construction industry, foldable flexibility tensile stress S2). (3) smooth makes writable printable S3). Silk major approach sheet Compared paper, fire addition writing (Figure 1). eyJraWQiOiI4ZjUxYWNhY2IzYjhiNjNlNzFlYmIzYWFmYTU5NmZmYyIsImFsZyI6IlJTMjU2In0.eyJzdWIiOiJmNjEwY2FjMTViNzFmNTVjZDYxNDI2YjExOTBlMDNlYSIsImtpZCI6IjhmNTFhY2FjYjNiOGI2M2U3MWViYjNhYWZhNTk2ZmZjIiwiZXhwIjoxNjg2OTk2Njg2fQ.mTbBU76tTLjN_REeKAnukqYlw2l60PA_NRdwuRLF9mweg3ZNZOQFQafvtZ6oNCZI1NvUNPlCi4JGihb_Y8QrDovmAGdaQdfpgsHZDLT-s9IUInC_UUxp7BKaKoXGBN_IdWhkrFyhQsYeKWUebtTcKHKTrSSwQlGJ8k6MVdw-sL4vtl6tmsBCj1xvtCKEK-EZir119G7aJMkwYcVlhpkkkr2c2WOK3vZOqH3qzxdcXB6BRyt1EudiycVbSUNmyMkGDYPbkTFDjb_ej5jMoTLEn0sxL5pNAjsBEyu0ns8jn4EPhXPGBd-v9KF-73uYaqBFUpE7DzonqBiw60kH8N1B4A Download .mp4 (2.58 MB) Help files Video S1. flame-retardant eyJraWQiOiI4ZjUxYWNhY2IzYjhiNjNlNzFlYmIzYWFmYTU5NmZmYyIsImFsZyI6IlJTMjU2In0.eyJzdWIiOiIyYjExNTAxNDVkZWE3ZjIxOWRlMGI3YjM2ZjFlNTMzYyIsImtpZCI6IjhmNTFhY2FjYjNiOGI2M2U3MWViYjNhYWZhNTk2ZmZjIiwiZXhwIjoxNjg2OTk2Njg2fQ.muFyOFMOvRQajNb1_G-FcINIbLP45RGOAPYMDJH9J_pYe8SnVCZw1NtPFgOznGoHvO4S-YnG5YMjz-G6uxUOdmloSuo8gNdJAps40rcLLOVnrfTJzh8joPJZIisXfrCqBkXSmaik8QyhmUYVf-oVHB2Ku_0_2_bnbBL2J2AJGo_HEQjXmotbMy1ixTXjZa5643O3bkD-yopFBhyvSDx_-D6b3ez0uvTB_W1YT6AyMhHLKvlv4mkUCs-Gvo3kC7x-ZtYA4BGuSAQOshCnUIa6XIJIAly8E6sFwuw9n7DS2rYvoHsN8As2WswEp9rfosh1_06Fkf9qbcIfNbxrT0S-7Q (1 S2. dynamic crane eyJraWQiOiI4ZjUxYWNhY2IzYjhiNjNlNzFlYmIzYWFmYTU5NmZmYyIsImFsZyI6IlJTMjU2In0.eyJzdWIiOiIxYTViYWFlNTFhOTVjZTljM2U2ZTUzZDJlOGJiODFiZCIsImtpZCI6IjhmNTFhY2FjYjNiOGI2M2U3MWViYjNhYWZhNTk2ZmZjIiwiZXhwIjoxNjg2OTk2Njg2fQ.dR6_6go-yt08g2zhSSfSIIk1Le8mapwD7xk89TzC1Rcnrew6_NvxAL_RADzgWlmI6-vtEyvlgZyXnMcHoOw0gfODkFcg7q0_83FJrp8QtuNKjG7fToKDfg5lINycXI4b0IctELOce3LntXScWSv4GG5ZjrELyCSDgsFLa3WaiGAuAwvgnmQCgYBYJJG3dyhkaJjmHffYJPZ-8eIOPEIGVdo62uJkLe5G4JWT4ogMx8kPoxsgeCQd5hq0uawwBxRurEV_A_ud83UXRz9O07Kif-03rUSI0dyunANXzUWwXQb2N-rGRWQpL12exviwM1zMasxaltFPanUO30-YTLYOWA (1.38 S3. low-temperature rapid realize space aircraft withstand shock service. us shows good flexural measured three-point test, stress-deflection relationships (LC)-3 LC-4 S2A. With deflection, gradually eventually stabilizes. before after 0.42 0.35 MPa, respectively. loading S2B. During characteristics. Although part intermediate interface separated (shown upper left corner S2A), whole remains intact unloading. S2C stress-strain curves LC-3 LC-4, seen initial fracture two metastructures occurs strain 2%, caused typical (inset S2C). After fracture, continues bear until failure structure, stresses both around 1.22 indicates explore influence absorbance performance, kinds were prepared. them, LC-1 LC-2 unoptimized patterns, optimized metastructures. applies square pattern (the area approximately patterns). thicknesses three layers PRF, respectively, parameters listed Table thickness first bottom 0.75 mm. alternately laid forms. include parts: side length (L) (R) pattern. geometry specific further metastructure, (LMGA). described previous work.26Huang Scholar,30Huang results selected respectively.Table 1The metastructureLayer123456789Top skeletond1∗ (mm)PRF1d2∗ (mm)PRF2d3∗ (mm)PRF3d4∗ (mm)PRF4d5∗ (mm)R (Ω/sq)d (mm)Unoptimized14 × 14 mm12 12 mm14 mmLC-10.75250.20.9250.21.0250.2–––0.75LC-20.75250.20.8250.20.9250.21.0250.20.75Optimized–15 15 mm15 mmLC-30.51900.21.59500.21.51,0000.2–––1.5LC-40.51900.21.59500.21.51 0000.21.5–––d1 d5 skeleton, respectively; d2, d3, d4 Open table tab d1 accurately printed scatter incident field, allow effect sacrificing thinness. silk-printed Figures 2A 2D . differences shape parameter values S3A. 2B, 2C, 2D, 2E show micro-morphology PRF. low- high-resistance inks nanoparticles graphite. adsorbed comparison 2C ink (1,000 Ω/sq) uniformly continuously distributed low-resistance (25 Ω/sq), some holes affect lead higher reflectivity. microstructures 2F. dispersed among graphite, contributes formation spatial microcircuit network improves microstructure 1,000°C studied, S3B. protected, original maintained treatment. nanometers graphite very maintain designe