轻质高强多胞金属微纳结构光/化复合可控制备及协同强化机制

Aiming at the difficulties in the preparation of complex and fine cellular metal structures at the micro/nano scale, combined with the dual advantages of the femtosecond laser direct writing technology and the chemical deposition process, with the characterization of the wood multi-layer structure, a novel fabrication method of light weight, high strength and high toughness shell-core cellular metal micro-nanostructures is proposed in this proposal. To achieve the fabrication principles of shell-core cellular metal micro-nanostructures and clarify its collaborative strengthening mechanism, some important fundamental issues are addressed. The first is to systematically investigate the effects of laser/chemical deposition compound processing parameters on the surface integrity and micro-mechanical properties of the shell-core cellular metal micro-nanostructures. The second is to reveal the material matching of polymer and metal layer, interfacial bonding, and the influence law of deposition parameters on the degree of metallization in cellular polymer micro-nano structure. Then the interfacial regulation mechanism between metal layer/metal layer and the synergistic strengthening mechanism in the forming process are clarified. The last is to characterize the typical microstructure of the shell-core cellular metal micro-nanostructures and develop the strong correlations among the preparation parameters, micro-nanostructure and mechanical performance. As a result, the material-structure-performance integrated manufacturing theory can be developed and the prediction and control of high-quality light weight, high strength shell-core cellular metal micro-nanostructures and functions can be realized. The above researches involve many new scientific issues, and these research achievements can not only enrich and develop the cellular metal micro-nanostructures basic theory and technique, but also provide theoretical basis for micro-nano device manufacturing fields.

针对微纳尺度复杂精细多胞金属结构制备难题，结合飞秒激光直写技术与化学沉积工艺复合效应的双重优势，以木材多层结构为特征，本项目提出轻质高强韧壳核多胞金属微纳结构光/化复合制备新方法，拟开展核壳多胞金属微纳结构制备理论及协同强化机制的研究。系统研究光/化复合作用下工艺参数对核壳多胞金属-高分子复合微纳结构表面完整性和微力学性能的影响规律，揭示多胞高分子微纳结构沉积金属粒子与高分子的材料匹配性、界面结合及沉积参数对金属化程度的影响规律，阐明多次沉积金属层/金属层的界面调控机制及协同强化机制，表征壳核多胞金属微纳结构的典型微观结构，建立工艺参数-微纳结构-微性能间的强关联关系，形成材料-结构-性能一体化制造基础理论，实现高质量轻质高强壳核多胞金属微纳结构的预测与控制。相关研究内容涉及众多全新科学问题，其研究成果可以丰富和发展多胞金属微纳结构基础理论和技术，为微纳器件制造领域提供理论依据。

针对微纳尺度复杂精细多胞金属结构制备难题，结合飞秒激光直写技术与光固化工艺的双重优势，以木材多层结构和乌贼骨“薄壁-隔层”结构为特征，本项目提出轻质高强韧多胞金属微纳结构制备新方法，拟开展多胞微纳结构制备理论及协同强化机制的研究。系统表征飞秒激光作用下多胞木桩微纳结构的典型微观结构，研究工艺参数对多胞高分子微纳结构表面完整性和微力学性能的影响规律，建立工艺参数-微纳结构-微性能间的强关联关系，形成材料-结构-性能一体化制造基础理论。受乌贼骨“薄壁-隔层”微观结构的启发，采用光固化及选择性激光熔化方法研究具有波纹壁核心的新型多层级仿生结构优异的能量吸收能力，旨在揭示非对称正弦波形壁芯的振幅、波长和高度对夹层结构压缩性能的影响；揭示仿生制备多层级仿生微结构吸能机理，实现高质量轻质高强多胞金属微纳结构的预测与控制。相关研究内容涉及众多全新科学问题，其研究成果可以丰富和发展多胞微纳结构基础理论和技术，为微纳器件制造领域提供理论依据。