Preparation and properties of ultralight fibrous β-Si3N4 3D scaffolds with honeycomb-like structure by directional freeze-casting

3D printing of honeycomb Si3N4 ceramic

“…The unique fracture behavior exhibited by the as‐prepared high‐precision honeycomb Si 3 N 4 ceramics also allowed us to prepare large‐scale honeycomb sandwich ceramics in the future. The compressive strengths of other state‐of‐the‐art 3D‐printed honeycomb and lattice ceramics are summarized in Figure 4d 4,40–48 . It can be proved that the preparation of Si 3 N 4 honeycomb ceramics in this work has relatively excellent mechanical properties, and this research will further simplify the preparation process of honeycomb Si 3 N 4 ceramics and greatly reduce the manufacturing cost.…”

“…The compressive strengths of other state-of-the-art 3Dprinted honeycomb and lattice ceramics are summarized in Figure 4d. 4,[40][41][42][43][44][45][46][47][48] It can be proved that the preparation of Si 3 N 4 honeycomb ceramics in this work has relatively excellent mechanical properties, and this research will further simplify the preparation process of honeycomb Si 3 N 4 ceramics and greatly reduce the manufacturing cost.…”

“…As a structural material with excellent reliability and performance, Si 3 N 4 ceramics have been widely applied in aerospace, mechanical engineering, electronic devices, and biomedical fields due to their excellent mechanical properties, resistance to wear, thermal shock, and corrosion and oxidation, and wave-transparent properties. [1][2][3][4][5][6] In the field of functional materials, Si 3 N 4 -based composite materials prepared by the incorporation of special conductive materials could also have excellent wave-absorbing and stealth properties. 7,8 Furthermore, Si 3 N 4 ceramics also exhibit the characteristics of high strength and high stiffness, but their intrinsic nature of brittleness greatly limits their broadly industrial applications.…”

“…7,8 Furthermore, Si 3 N 4 ceramics also exhibit the characteristics of high strength and high stiffness, but their intrinsic nature of brittleness greatly limits their broadly industrial applications. 4,9 Therefore, reducing the probability of catastrophic failure of ceramic-based materials will enable to greatly extend the range of application potentials for such ceramic materials. [10][11][12] As a source of inspiration for the design of structural materials, nature provides many unique and harmonic structures with excellent functionalities and also mechanical properties.…”

“…In the field of functional materials, Si 3 N 4 ‐based composite materials prepared by the incorporation of special conductive materials could also have excellent wave‐absorbing and stealth properties 7,8 . Furthermore, Si 3 N 4 ceramics also exhibit the characteristics of high strength and high stiffness, but their intrinsic nature of brittleness greatly limits their broadly industrial applications 4,9 . Therefore, reducing the probability of catastrophic failure of ceramic‐based materials will enable to greatly extend the range of application potentials for such ceramic materials 10–12 .…”