Thermal Conductivity of Composite Materials Copper-Fullerene Soot

Abstract

Copper-based composites strengthened with fullerene soot nanoparticles of 20–30 nm size in concentration up to 23 vol.% were prepared via two methods: mechanical mixing and molecular level mixing. The dependence of thermal conductivity on the carbon concentration was studied. Maxwell’s model describes well the change in the thermal conductivity of the composite obtained by molecular level mixing. However, thermal conductivity of the composite produced by mechanical mixing is significantly lower than the calculated values, due to structural inhomogeneity and residual stresses. Comparison of the thermal conductivity of Cu-fullerene soot composites with that of Cu-based composites described in the literature showed that the prepared materials are not inferior in thermal conductivity to composites containing carbon nanotubes, despite the fact that fullerene soot has a much lower thermal conductivity.

The Effect of Copper–Graphene Composite Architecture on Thermal Transport Efficiency

“…where k is the thermal conductivity of the composite, k i is the thermal conductivity of the ith component, and V i is the volume fraction of ith component [43]. The values of graphene volume fraction and its coefficient of thermal conductivity k Gr are presented in Table 2.…”

Silver-Matrix Composite with Fullerene Soot Nanoparticles Produced by Electrodeposition

“…The process temperature was 20-30 • C. Fullerene soot (Suzhou Dade Carbon Nanotechnology Co., Suzhou, Jiangsu, China) in amounts of 0.05 and 0.2 g/L was additionally introduced into the electrolyte directly during the electrochemical process of obtaining silver powder. Fullerene soot consists of particles with an average size of 40 nm [10]. In this case, the electrolyte was mixed with an electromagnetic stirrer with a speed of 500 rpm for a uniform supply of carbon nanostructures to the cathode.…”

“…To date, there is no work devoted to Ag-based materials reinforced with fullerene soot (mainly amorphous carbon nanoparticles). In previous works, we showed, using the example of copper-fullerene soot materials, that it is possible to obtain composites with a combination of hardness-thermal conductivity properties comparable to copper-CNT materials [10]. In the presented work, a method is proposed for obtaining a composite powder material, silver-fullerene soot (FS), by electrolytic deposition from an aqueous solution of silver nitrate.…”

High temperature tribological response of Fe-2Cu-0.8C-CaF2 self-lubricating composites at high speeds

“…35,36 k d is the thermal conductivity of the counterface disc (EN31 steel, 50 W/mK). 35 k p was estimated using Maxwell's equation (equation ( 2)), 37,38 by taking vol. % of pin material constituents and their thermal conductivity (in W/mK) at 500 °C pin heating (for Fe-0.8C is 37, 39 Cu is 360, 40 CaF 2 is 3.4).…”