摘要
Multilayer boron nitride nanosheets(BNNSs)are promising two-dimensional structure‒function enhancers due to their structural and mechanical similarity to multilayer graphene(MLG).However,challenges in scalable synthesis/preparation techniques and effective interfacial integration approaches for BNNSs have limited their application in ceramic-matrix composites.Herein,we report the cost-effective,large-scale production of high-quality MBNSs via threeroll milling and their incorporation into a dual-phase SiC matrix through a tailored interfacial modification strategy.These MBNSdominated microstructures activated multiple synergistic toughening mechanisms,yielding an~95% increase in flexural strength and an~50% enhancement in fracture toughness.Additionally,the composite exhibited excellent electromagnetic absorption performance,achieving a minimum reflection loss(RLmin)of−52.59 dB at 1.22 mm and a maximum effective absorption bandwidth(EABmax)of full Ku-band coverage(5.6 GHz)at 1.09 mm thickness.This work presents a scalable strategy for the fabrication of high-performance,structurally and functionally integrated composites,offering significant potential for advanced structural and electromagnetic applications.
基金
supported by the National Natural Science Foundation of China(Grant No.52272063)
Aeronautical Science Foundation of China(Grant No.2024Z055056001)
Key Research and Development Program of Jiangxi Province(Grant No.20243BBI91006).
