A Review on Nanocarbon-Reinforced Cu-Matrix Nanocomposites with High Mechanical Strengths

Background: Despite of the fact that nanocarbon can effectively improve mechanical properties and reduce mass density of Cu-matrix composites, there are lacking comprehensive reviews on preparation and properties of nanocarbon-reinforced Cu-matrix composites synthesized with carbon nanotubes (CNTs) or graphene nanoplates (GNPs). This review presents research on interfaces between nanocarbon/Cu and strengthening mechanisms of nanocarbon-reinforced Cumatrix composites, and existing problems in the research on these nanocomposites. Methods: Research articles in open literature related to nanocarbon-reinforced Cu-matrix composites were critically reviewed. Original research on this topic was also presented in this article. Results: Research results have shown that Cu-matrix composite materials have advantages of high strengths while retaining sufficient thermal and electrical conductivities. Nanocarbon can effectively improve mechanical properties, and reduce mass density of the Cu-matrix composites. Effective mechanical lock is formed between nanocarbon and Cu matrix, which enhances the properties of the composites. Since CNTs and GNPs have different characteristics, and consequently, Cu matrix can be enhanced to maintain its high conductivity, high mechanical properties and high wear resistance. Conclusion: Nanocarbon-reinforced Cu-matrix composites have been studied for the new energy applications, and these composites possess the potentials to reach the requirements for being light weighted and with enhanced mechanical and physical properties. Designed nanocarbon-reinforced Cu-matrix composites should satisfy application and environmental requirements in the new energy field with enhanced mechanical, physical and chemical properties.