Thermal conductivity of Cu-graphite composites

Kováčik, Jaroslav; Emmer, Štefan; Bielek, J.

doi:10.1016/j.ijthermalsci.2014.12.017

Cited by 61 publications

(24 citation statements)

References 11 publications

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“…In order to decrease the density of copper-graphite composite the Cu content reduction is required. According to interpolation [13] of Kováčik's data the composite TC in 0-20 vol.% Cu range is almost constant and close to graphite TC. In present work the possibility of enhancing the thermal conductivity of expanded graphite via doping by copper in a 0-8% range was demonstrated.…”

Section: Resultsmentioning

confidence: 82%

“…The thermal conductivity of copper-graphite composites was discussed in [13][14][15][16][17][18][19]. It's known from works [13,14], where TC of materials prepared from the mixture of copper and graphite powder by the powder metallurgy method was measured, that the rise of volume copper fraction leads to drastic thermal conductivity growth for >50% vol% Cu content. According to [15] the TC achieved in the composites depends on the graphite type used, the heat treatment during consolidation and the volume fraction of graphite.…”

Section: Resultsmentioning

confidence: 99%

“…According to [15] the TC achieved in the composites depends on the graphite type used, the heat treatment during consolidation and the volume fraction of graphite. The density of obtained metal-graphite composite Cu-graphite composites [13] varied from 6.1 to 8.9 g/cm 3 which is not suitable for thermal management applications where the weight of material is crucial. In order to decrease the density of copper-graphite composite the Cu content reduction is required.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Cu-Expanded Graphite Composite Material Preparation and Thermal Properties

Karzov

Шорникова

Filimonov

et al. 2017

Eurasian Chem. Tech. J.

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A composite material based on expanded graphite (EG) and copper compounds was obtained by natural graphite oxidation with 95% nitric acid, copper (II) nitrate and granular carbamide addition with further rapid heat treatment at three different exfoliation temperatures: 800, 1000 and 1200 °С. It was found that the composition of copper containing graphite material depends on the temperature and the atmosphere of thermal expansion. The formation of copper oxides can be eliminated if rapid heat treatment is conducted in nitrogen at 1200 °С. Thermal conductive properties: thermal diffusivity and specific heat capacity of obtained Cu-expanded graphite samples were measured. It was revealed that the dependence of thermal conductivity (TC) of Cu-graphite material has non-linear character in the studied range of copper content. The incorporation of 3% copper into expanded graphite allows to increase its thermal conductivity by 20% while the further Cu content growth leads to the TC decrease from 6 to 4.5 W/(m∙K). The specific heat capacity is constant at ω(Cu)<3% and reduces in the range (3‒8)% Cu. The advantage of proposed technique of Cu-expanded graphite materials preparation is exclusion graphite intercalation compounds hydrolysis step with further drying because of carbamide addition.

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Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Cu-Expanded Graphite Composite Material Preparation and Thermal Properties

Karzov

Шорникова

Filimonov

et al. 2017

Eurasian Chem. Tech. J.

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“…The principle of comparative cut bar method (ASTM E1225 Test Method) is adopted in the test; this is perhaps the most widely used method for axial thermal conductivity assessment. Three specimens were machined out from each casting and tested [10], the results of which are shown in Table 6.…”

Section: Testing and Resultsmentioning

confidence: 99%

Influence of Reinforcement Parameters on Thermal Conductivity of Lm6 Alloy/Soda Lime Glass Composites Through Taguchi’s Orthogonal Array Approach

Shivakumar¹

2016

IJRET

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Metal Matrix Composites (MMCs) are an important class of composite materials which provide as alternate substitute for conventional materials, when desired properties are necessary for the applications. Aluminium alloy composites find applications where high strength to weight ratio is mandated. This work aims to characterize the thermal properties like thermal conductivity of LM6 aluminium alloy/glass powder composite developed by stir casting techniques. The effect of glass powder parameters is aimed at characterization on the developed composites. Taguchi's orthogonal array approach is adopted to reduce the experimentation burden. Parameter levels of glass powder are optimized for the desired thermal conductivity of the composite.

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“…To enhance the anisotropic thermal conductivity property of Cu, a few researchers used different llers (reinforcement) such as graphite, graphene oxide and graphene. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Graphene has extraordinarily high values of anisotropic thermal conductivity in-plane (4000-5000 W m À1 K À1 ) 16 and through-plane (5-20 W m À1 K À1 ), 17 so it is the best choice as a ller in a metal. Most of the researchers used graphene and its derivatives with metals and polymers.…”

Section: Introductionmentioning

confidence: 99%