Thermal conductivity of graphite flakes–SiC particles/metal composites

Prieto, R.; Molina, J.M.; Narciso, J.; Louis, E.

doi:10.1016/j.compositesa.2011.08.022

Cited by 112 publications

(47 citation statements)

References 19 publications

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“…This is in line with the drainage curves measured in this work that show a slow increase of saturation with applied pressure. Note that in standard graphite or SiC particles saturation is reached for applied pressures lower than twice the threshold pressure [14][15][16][17][18][19][20][21][22][23]. The effects of a third alloying element was also investigated, concluding that Mg and Ti additions are those that produce the M A N U S C R I P T…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Effects of infiltration pressure on mechanical properties of Al–12Si/graphite composites for piston engines

Narciso

Molina

Rodriguez

et al. 2016

Composites Part B: Engineering

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In this work results for the flexural strength and the thermal properties of interpenetrated graphite preforms infiltrated with Al-12wt%Si are discussed and compared to those for packed graphite particles. To make this comparison relevant, graphite particles of four sizes in the range 15-124 µm, were obtained by grinding the graphite preform. Effects of the pressure applied to infiltrate the liquid alloy on composite properties were investigated. In spite of the largely different reinforcement volume fractions (90% in volume in the preform and around 50% in particle compacts) most properties are similar. Only the Coefficient of Thermal Expansion is 50% smaller in the preform composites. Thermal conductivity of the preform composites (slightly below 100 W/m.K), may be increased by reducing the graphite content, alloying, or increasing the infiltration pressure. The strength of particle composites follows Griffith criterion if the defect size is identified with the particle diameter. On the other hand, the composites strength remains increasing up to unusually high values of the infiltration pressure. This is consistent with the drainage curves measured in this work. Mg and Ti additions are those that produce the most significant improvements in performance. Although extensive development work remains to be done, it may be concluded that both mechanical and thermal properties make these materials suitable for the fabrication of piston engines.

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Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Effects of infiltration pressure on mechanical properties of Al–12Si/graphite composites for piston engines

Narciso

Molina

Rodriguez

et al. 2016

Composites Part B: Engineering

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“…By using the equation , with  being the thermal diffusivity and C p and ρ being the specific heat at constant pressure and density, respectively, the thermal conductivity K of the sample was easily calculated. When C p is unknown, as it is the case in the present study for the different materials fabricated, the linear rule of mixtures can offer a good approximation (see [13] for details).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…The present contribution is addressed to evaluate the implications of the inherent anisotropy of the recently developed G f -SiC p /matrix composites [12][13][14][15][16][17] by considering two largely different thermally conductive matrices: Al-12wt.%Si alloy and epoxy resin. The evaluation of the anisotropy of the composite was carried out by cutting samples out from primigenial pieces (one for each matrix type) at a variable angle  with respect to the flakes plane, and measuring their thermal conductivity.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…Packing of the flakes by a common uniaxial pressing procedure tend to orient them in such a way that they lie on top of each other, conforming a relatively dense preform with no open channels to allow infiltration of the liquid metal, necessary to consolidate the material. This difficulty has been solved by a new method developed by the authors [12][13][14][15][16][17] that consists of preparing and packing powder mixtures conformed by a combination of graphite flakes and another finely divided material with a largely different morphology (i.e. SiC particles or carbon fibers).…”

Section: Introductionmentioning

confidence: 99%

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Anisotropy in thermal conductivity of graphite flakes–SiCp/matrix composites: Implications in heat sinking design for thermal management applications

Molina

Louis

2015

Materials Characterization

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Within the frame of heat dissipation for electronics, a very interesting family of anisotropic composite materials, fabricated by liquid infiltration of a matrix into preforms of oriented graphite flakes and SiC particles, has been recently proposed. Aiming to investigate the implications of the inherent anisotropy of these composites on their thermal conductivity, and hence on their potential applications, materials with matrices of Al-12wt.%Si alloy and epoxy polymer have been fabricated. Samples have been cut at a variable angle with respect to the flakes plane and thermal conductivity has been measured by means of two standard techniques, namely, steady state technique and laser flash method. Experimental results are presented and discussed in terms of current models, from which important technological implications for heat sinking design can be derived.

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“…Recently, the high quality graphite flake with high TC in basal plane, low density and cheap price is receiving increasing attention [4]. Both binary and ternary aluminum based composites containing the Graphite have been investigated and show remarkable thermal properties [5]. The wettability between Cu and graphite is poor and flakes are tended to lie on the top of each other in the fabricating process.…”

Section: Introductionmentioning

confidence: 99%

Thermal Conductivity and Microstructure of Copper Coated Graphite Composite by Spark Plasma Sintering Process

Park¹,

Kim²,

Lee³

et al. 2017

Archives of Metallurgy and Materials

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This study focuses on the fabrication of thermal management material for power electronics applications using graphite flake reinforced copper composites. The manufacturing route involved electroless plating of copper in the graphite flake and sintering process are optimized. The microstructures, interface, thermal properties, and relative density of graphite/Cu composites are investigated. The relative density of the composites shows 99.5% after sintering. Thermal conductivities and coefficients of thermal expansion of this composites were 400-480 Wm -1 K -1 and 8 to 5 ppm k -1 , respectively. Obtained graphite nanoplatelets-reinforced composites exhibit excellent thermo-physical properties to meet the heat dispersion and matching requirements of power electronic devices to the packaging materials.

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Thermal conductivity of graphite flakes–SiC particles/metal composites

Cited by 112 publications

References 19 publications

Effects of infiltration pressure on mechanical properties of Al–12Si/graphite composites for piston engines

Effects of infiltration pressure on mechanical properties of Al–12Si/graphite composites for piston engines

Anisotropy in thermal conductivity of graphite flakes–SiCp/matrix composites: Implications in heat sinking design for thermal management applications

Thermal Conductivity and Microstructure of Copper Coated Graphite Composite by Spark Plasma Sintering Process

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