多序度氧化石墨烯负载纳米粒子原位混杂强化金属基复合材料电接触行为

针对国家重大科学工程对强脉冲功率源脉冲开关电极材料不能满足其“三高”性能的迫切需求，项目基于多序度多相原位混杂强化原理，拟通过水热法在自备的氧化石墨烯表面负载纳米粒子，并通过多物理场真空等离子放电热压烧结工艺制备多序度氧化石墨烯负载纳米粒子原位混杂强化铜钨铬金属基复合材料。探讨水热反应条件对氧化石墨烯表面负载纳米粒子的形貌与分布影响规律；阐明水热合成条件与SPS工艺参数与负载用纳米粒子形貌分布、金属粉体与界面原位增强纳米碳化物之间的关联规律；采用电接触测试设备考查多序度氧化石墨烯负载纳米粒子原位混杂强化金属基复合材料接触电阻、熔焊力、燃弧能量、电弧烧蚀质量等电接触行为，构建电弧烧蚀行为物理及数学模型。基于SEM原位拉伸技术分析氧化石墨烯、负载纳米粒子以及氧化石墨烯/金属界面原位自生增强碳化物对复合材料力学性能的影响规律。旨在为探索石墨烯原位增强金属基复合材料在高技术环境中的应用提供新途径。

Due to the urgent requirements of the national major scientific project for the high-pulse power source pulse switch electrode materials, which cannot satisfy its "three-high" performance, nanoparticles anchored on the graphene oxide and the multi-sequence and hybrid in-situ nanoparticles anchored on graphene oxide reinforced CuWCr metal matrix composite are synthesized via hydrothermal and multi-physics field vacuum plasma discharge hot-press sintering process, respectively, which is based on the multi-sequence and multi-phase in-situ hybrid strengthening principle. The influence of the hydrothermal reaction conditions on the morphology and distribution of nanoparticles anchored on the surface of graphene oxide is discussed. Besides, the correlation rules between the metal powder morphology, SPS process parameters and the interfacial in-situ nano-carbide are clarified. The electrical contact behavior of the multi-sequence and hybrid in-situ nanoparticles anchored on graphene oxide reinforced metal matrix composite are examined by using the electrical contact test equipment, such as contact resistance, welding force, arc energy, and arc ablation quality. Furthermore, physical and mathematical models are constructed based on its arc erosion behavior. The effects of the graphene oxide, anchored nanoparticles, and in-situ reinforced carbides at the graphene/metal interface on the mechanical properties of the composites are analyzed by using the FE-SEM in-situ tensile test technology. Herein, this study may provide new insights and new way to explore the application of the graphene in-situ reinforced metal matrix composites in high-tech environments.