4.6 Article

Study on Metallurgically Prepared Copper-Coated Carbon Fibers Reinforced Aluminum Matrix Composites

期刊

METALS AND MATERIALS INTERNATIONAL
卷 27, 期 12, 页码 5425-5435

出版社

KOREAN INST METALS MATERIALS
DOI: 10.1007/s12540-020-00897-1

关键词

Electroless copper plating; Carbon fiber; Aluminum matrix composites; Spark plasma sintering; Mechanical properties; Corrosion resistance

资金

  1. independent innovation projects of Central South University China [2017zzts429]
  2. Innovative research team Projects in Dongguan city China [2014607101004]
  3. Natural Science Foundation of Hunan Province China [2020JJ5100]

向作者/读者索取更多资源

The study focused on the preparation and characterization of electroless copper-coated carbon fibers reinforced aluminum composites. The microstructure observation revealed uniform distribution of fibers and the formation of an interfacial layer between the fiber and Al matrix. Mechanical properties such as Vickers hardness, tensile strength, and bending strength showed significant improvement due to the synergistic effect of dispersion, precipitation, and solution strengthening.
Carbon materials, like carbon fiber, carbon nanotubes and graphene, were widely used as promising reinforcements to strengthen aluminum matrix composites (AMCs). The dispersion of reinforcement in matrix and interface wettability between matrix and reinforcing phase have been key factors affecting AMCs properties. In this study, electroless copper-coated carbon fibers reinforced aluminum (Cu-C-f/Al) composites were prepared by spark plasma sintering processing followed by heat treatment. Microstructure and mechanical properties were investigated. Microstructure observation indicated that fibers distributed uniformly in the composites containing up to 9 wt% copper-coated carbon fibers (Cu-C-f). In addition, an interfacial layer of 50 nm thickness was formed between the fiber and Al matrix due to mutual diffusion of Cu and Al atoms. Vickers hardness, tensile strength and bending strength of 9 wt% Cu-C-f/Al composite increased from 40 to 93 HV, 59 to 190 MPa and 110 to 326 MPa, respectively, compared to Al matrix. The improved mechanical properties are ascribed to the synergistic effect of dispersion, precipitation and solution strengthening. However, the elongation of composite decreased as compared to that of Al matrix. Moreover, Cu-C-f/Al composite exhibits superior corrosion resistance over uncoated carbon fiber/Al composite but less than Al matrix.

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