Multiscale graphene/carbon fiber reinforced copper matrix hybrid composites: Microstructure and properties
Multiscale graphene/carbon fiber reinforced copper matrix hybrid composites: Microstructure and properties
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DOI：
10.1016/j.msea.2018.11.117
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发表时间：
2019-01
期刊：
影响因子：
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通讯作者：
Xinjiang Zhang;Wenchao Yang;Jinyi Zhang;X. Ge;Xueran Liu;Y. Zhan
中科院分区：
文献类型：
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作者：
Xinjiang Zhang;Wenchao Yang;Jinyi Zhang;X. Ge;Xueran Liu;Y. Zhan
开发了用于铜基混杂复合材料的多尺度石墨烯/碳纤维（G/CF）增强体。采用湿混法制备了均匀的G/CF/Cu混合粉末，然后通过热压烧结致密化得到块体复合材料。研究了复合材料的微观结构、导电性能和力学性能。在烧结体中，混杂的G和CF增强体在Cu基体中随机分布。CF呈现不同的空间取向，G纳米片呈现互联网络状分布。复合材料的硬度和拉伸屈服强度随着G的增加而增加。随着G含量的增加，复合材料的抗拉强度呈现先提高后降低的趋势。在添加更多G的复合材料中显示出较低的电导率，但仍达到80.0%IACS以上。这些性能变化可以从CF/G混合添加剂的空间几何分布和特性中寻找，并对相关机理进行了讨论。
Multiscale graphene/carbon fiber (G/CF) reinforcements were developed for copper matrix hybrid composites. The homegenious G/CF/Cu mixture powders were firstly prepared by the simple wet-mixing process, and then densified by hot-pressed sintering to obtain bulk composites. Microstructure, electrical conductivity and mechanical properties of such composites were investigated. In the sintered compacts, the hybrid G and CF reinforcements distributed randomly in Cu matrix. CF presented the various space orientations, and G nanosheets exhibited the interconnected network distribution. Hardness and tensile yield strength of composites were improved evidently by hybrid G/CF addition, which increased with G increasing. However, the ultimate tensile strength were firstly enhanced and then deteriorated by increasing G content. The lower electrical conductivity showed in the more G-added composite, but still reached more than 80.0% IACS. These performance change could be sought in the spatially geometrical distribution and characteristic of hybrid CF/G additions, and the relevant mechanisms were discussed.