Journal
MATERIALS
Volume 12, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/ma12040670
Keywords
carbon nanotubes (CNTs); copper composites; interfacial bonding; mechanical properties
Categories
Funding
- Natural Science Foundation of China [51741102]
- Key Preparation Methods and Applied Research of Advanced Carbon Nanotubes Reinforced Copper Materials of Education Department in Yunnan Province [2016CYH08]
- Advanced Powder Materials Innovation Team of KMUST in Yunnan Province [2017HC033]
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Carbon nanotube (CNT)-reinforced metal matrix composites (MMCs) face the problems of dispersion and interfacial wetting with regard to the matrix. A synergetic method of spray pyrolysis (SP) and flake powder metallurgy (FPM) is used in this paper to improve the dispersibility and interfacial bonding of CNTs in a Cu matrix. The results of the interface characterization show interface oxygen atoms (in the form of Cu2O) and a high density of dislocation areas, which is beneficial for interfacial bonding. The tensile results show that the tensile strength of the SP-CNT-Cu composites is much higher than that of the CNT-Cu composites when the mass fraction of the CNTs does not reach the critical value. This can be explained by the nanoparticles which are found on the surface of the CNTs during the SP process. These nanoparticles not only increase the tensile strength of the SP-CNT-Cu composites but also improve the dispersion of the CNTs in the Cu matrix. Thereby, uniform dispersion of CNTs, interfacial bonding between CNTs and the Cu matrix, and the enhancement of tensile strength are achieved simultaneously by the synergetic method.
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