磁性非晶纤维功能复合材料的多级界面调控

Magnetic amorphous wires, especially glass-coated amorphous microwires fabricated by Taylor technique, have significant engineering perspective in next generation structural composites with integrated functionalities owning to their unique atomic structure and electromagnetic properties. The present project aims to produce wire-bunches of glass-coated amorphous microwires utilizing the so-called ‘wire bundle co-drawing technique’. In addition to control the size of wire and wire-bunch, the drawing process will be explored to tailor the micro-interface between metallic core and glass cover within a single microwire and the meso-interface between neighbouring wires within a bunch. The influence of processing parameters on the microstructure, mechanical and electromagnetic properties as well as residual stresses of the microwire and wire-bunches will be investigated. During the fabrication of wire-bunch composites, macromolecular coupling agent will be employed to tailor the wetting ability at the macro-interface between wire bunches and composite matrix. Thus, the multi-scale interfacial tailoring is realized at micro-, meso- and macro-scale, for composites containing amorphous wire-bunches. Property evaluation is then conducted to establish the relations among processing parameters, interfacial conditions and mechanical and electromagnetic properties, so as to optimize the design and fabrication of the developed functional composites for specific engineering applications.

磁性非晶纤维由于其独特的原子无序结构和电磁学特性在新型结构功能一体化复合材料领域具有重要的应用前景。本项目在玻璃包覆法制备磁性非晶纤维的基础上引入多根纤维集束拉拔概念,用以制备不同尺度的非晶纤维束；在改变纤维和纤维束几何尺寸的同时，调控纤维内部金属芯与包覆玻璃之间的微观界面以及束内纤维与纤维之间的介观界面特性；研究制备工艺参数对纤维和纤维束的微观结构、力学、电磁学特性和内部残余应力的影响。在非晶纤维复合材料制备过程中，通过大分子偶联剂来改善非晶纤维束与复合材料基体之间的宏观界面浸润性，进而实现非晶纤维复合材料在宏观、介观和微观尺度上的多级界面调控；通过组织分析和性能测试建立各级界面状态与非晶纤维复合材料的微波吸收性能和力学性能之间的关系，优化该类功能复合材料设计与制备工艺，最终为该类新型功能复合材料的工程应用提供技术支撑。

磁性非晶纤维由于其独特的原子无序结构和电磁学特性在新型结构功能一体化复合材料领域具有重要的应用前景。纤维内部几何尺寸、微观结构、应力状态等因素都对材料性能产生重要影响。本项目通过调整玻璃包覆金属非晶纤维拉拔工艺参数实现了微米、亚微米尺度金属非晶纤维的制备,研究了制备工艺参数对纤维和纤维束的微观结构、力学、电磁学特性和内部残余应力的影响。大分子偶联剂来改善非晶纤维束与复合材料基体之间的宏观界面浸润性，进而实现非晶纤维复合材料在宏观、介观和微观尺度上的多级界面调控；通过组织分析和性能测试建立各级界面状态与非晶纤维复合材料的微波吸收性能和力学性能之间的关系，优化了该类功能复合材料设计与制备工艺，最终为该类新型功能复合材料的工程应用提供技术支撑。