Influence of the interface structure on the thermo-mechanical properties of Cu–X (X=Cr or B)/carbon fiber composites

Veillère, Amélie; Heintz, Jean‐Marc; Chandra, Namas; Douin, Joël; Lahaye, Michel; Lalet, Grégory; Vincent, Cécile; Silvain, Jean François

doi:10.1016/j.materresbull.2011.11.004

Cited by 45 publications

(29 citation statements)

References 10 publications

(13 reference statements)

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“…1,2 High-performance mesophase pitch-based graphite fiber is an outstanding reinforcement for thermal management composites because of its high thermal conductivity (1100 WÁm À1 ÁK À1 ) and low CTE (À1.5 Â 10 À6 K À1 ) in the axial direction. 3 At the same time, aluminum has been widely used as metal matrix due to its high specific thermal conductivity (thermal conductivity divided by density) and ease of machinability. [4][5][6] Therefore, graphite fiber reinforced aluminum matrix composites, if processed properly, will offer a well combination of low CTE and high thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and thermal conductivity of short graphite fiber/Al composites by vacuum pressure infiltration

Liu

Zhang

et al. 2013

Journal of Composite Materials

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Short graphite fiber/Al composites were fabricated by a modified two-step vacuum pressure infiltration technique. Copper-coated graphite fibers preform was infiltrated with liquid aluminum at 800 C under infiltration pressure of 1 MPa and solidification pressure of 30 MPa for 30 min. The effects of surface modification and the processing parameters of vacuum pressure infiltration on relative density and thermal conductivity of the composites were systematically studied. The results show that short graphite fiber/Al composite with relatively high density of 99.1% and thermal conductivity of 208 WÁm À1 ÁK À1 was successfully fabricated. Through the application of copper coating onto the graphite fibers, the in-plane thermal conductivity of the composite was effectively enhanced from 117 WÁm À1 ÁK À1 to 208 WÁm À1 ÁK À1 as a result of improved interfacial bonding. The obtained short graphite fiber/Al composites are promising materials for electronic packing applications.

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Section: Introductionmentioning

confidence: 99%

Fabrication and thermal conductivity of short graphite fiber/Al composites by vacuum pressure infiltration

Liu

Zhang

et al. 2013

Journal of Composite Materials

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“…It is expected that the composites using copper as the matrix, which has a higher thermal conductivity and lower coefficient of thermal expansion than aluminum, may have a better thermal properties. However, there is few investigation on fabrication of graphite fiber/Cu composites since copper does not wet graphite [5,6]. One of the effective way is surface modification of depositing strong carbide forming elements such as Ti, Cr, Si, Mo or W on surface of graphite.…”

Section: Abstract-metal Matrix Composites; Thermal Conductivity; Coefmentioning

confidence: 99%

Fabrication and thermophysical properties of short graphite fiber/Cu composites with Mo<inf>2</inf>C coating by vacuum pressure infiltration

Zhang¹,

He²,

Liu³

2014

2014 Joint IEEE International Symposium on the Applications of Ferroelectric, International Workshop on Acoustic Transduction M

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High-performance mesophase pitch-based graphite fiber reinforced metal matrix composites offer a good thermal conductivity and tailorable coefficient of thermal expansion. These composites are regarded as a promising heat dissipation materials for electronic packaging application.It is reported that short graphite fiber/Al composites were fabricated by vacuum pressure infiltration, which is a suitable procedure for the fabrication of complex shaped components at high production rates and low cost. The thermal conductivity of short fiber/Al composites is lower than 230 W m -1 K -1 .It is expected that the composites using copper as the matrix, which has a higher thermal conductivity and lower coefficient of thermal expansion than aluminum, may have a better thermal properties. However, there is few investigation on fabrication of graphite fiber/Cu composites since copper does not wet graphite. This work focuses on the fabrication of short graphite fiber/Cu composites for thermal management application by vacuum pressure infiltration technique.A Mo2C coating was synthesized on the surface of graphite fiber through molten salts method for improving the wetting between graphite fibers and copper. Certain Grfs reacted with molybdenum oxides powders in a molten salts mixture composed of NaCl-KCl at 1000 for 30 min under a flowing argon atmosphere. The obtained coating is compact and homogenous with the thickness of 0.3 m. Copper was infiltrated into Mo2C-coated graphite preform at 1150with low pressure and Cu matrix composites with 20 vol% -40 vol% fibers were fabricated. Due to the unidirectional compression in the perform and infiltration process, the fibers were uniform distribution in the plane perpendicular to the press direction (X-Y plane) and showed a two dimensional orientation. The interface of composites was examined by EDS line-scan. Results show that there was copper infiltrated into the Mo2C interlayer. A good adhesion was observed in composites in which the Mo2C interlayer tightly adhered to both fiber and Cu matrix.The obtained composites present high relative density above 99.5%. With increasing volume fraction of fiber from 20% to 40%, the thermal conductivity of composites in X-Y plane slightly decreased from 356 W m -1 K -1 to 311 W m -1 K -1 . The coefficient of thermal expansion in X-Y plane decreased from 14× 10 -6 to 7 × 10 -6 K -1 . The experimental values of thermal conductivities of composites were compared with the theoretical calculation. With the introduction of Mo2C interlayer, the interface thermal conductance of graphite fiber/Mo2C interlayer/copper matrix had to be taken into consideration. So the effective thermal conductivity of coated fiber was firstly calculated by using the acoustic mismatch model (AMM). Then, a model of Maxwell-Garnett effective medium approach on the anisotropic short fiber reinforcement was used to estimate the thermal conductivity of composites. The result showed that the theoretical predictions are in good agreement with the experimental values. The thermal c...

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“…One route is to add alloying elements into the Cu matrix, and the other is to coat alloying elements onto diamond particles. The alloying elements used include Ti, Cr, W, Mo, Nb, Si, B, and so on [8][9][10][11]. The presence of the interfacial phases is crucial to the enhancement of thermal conductivity of the Cu/diamond composites [9,10,12].…”

Section: Introductionmentioning

confidence: 99%

Interface characterization of a Cu–Ti-coated diamond system

Lin

Wang

Zhang

et al. 2015

Surface and Coatings Technology

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Influence of the interface structure on the thermo-mechanical properties of Cu–X (X=Cr or B)/carbon fiber composites

Cited by 45 publications

References 10 publications

Fabrication and thermal conductivity of short graphite fiber/Al composites by vacuum pressure infiltration

Fabrication and thermal conductivity of short graphite fiber/Al composites by vacuum pressure infiltration

Fabrication and thermophysical properties of short graphite fiber/Cu composites with Mo<inf>2</inf>C coating by vacuum pressure infiltration

Interface characterization of a Cu–Ti-coated diamond system

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