Mo2C intermediate layers for the wetting and infiltration of graphite foams by liquid copper

Song, Jinliang; Guo, Quangui; Gao, Xiaoqing; Tao, Zechao; Shi, Jingli

doi:10.1016/j.carbon.2011.03.038

Cited by 40 publications

(13 citation statements)

References 22 publications

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“…The Mo 2 C interlayer between copper and graphite fibers has been reported to exert a significant influence on improving the thermal conductivity of composites by up to 40% because of extensive bonding at the interface [15]. The thermal conductivity of the C/C-Cu composite is just slightly lower than 153.7 W m À 1 K À 1 as calculated based on the "rule of mixtures" for composites [8]. Fig.…”

Section: Resultsmentioning

confidence: 97%

“…According to the results of DSC-TG analysis (Fig. S1 in the supplementary data) and the literature [8,9], the reactions of ammonium paramolybdate and C occur as follows: gasification of water, decomposition of ammonium paramolybdate, reduction of MoO 3 to MoO 2 , and carbonization of MoO 2 to Mo 2 C. Fig. 2(a) and (b) shows cross-sectional micrographs of the Mo 2 Ccoated C/C preform.…”

Section: Resultsmentioning

confidence: 98%

“…However, these layers show obvious diffusion of metal atoms into copper which sharply decreases the thermal conductivity of copper. Mo 2 C shows good wettability with copper and the solid solubility of Mo in copper is zero [7,8]. Plasma deposition, physical vapor deposition, and slurry technology have been applied to prepare the layers described above.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of a C/C–Cu composite with Mo2C coatings as a modification interlayer

Zhou

Peng

et al. 2015

Materials Letters

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Preparation of a C/C–Cu composite with Mo2C coatings as a modification interlayer

Zhou

Peng

et al. 2015

Materials Letters

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“…For example, it has been shown experimentally that thin films of Mo 2 C can be formed on the top of graphite surfaces resulting from MoO 3 reactions with the carbon atoms of graphite [65]. …”

Section: Resultsmentioning

confidence: 99%

The effect of the interlayer element on the exfoliation of layered Mo₂AC (A = Al, Si, P, Ga, Ge, As or In) MAX phases into two-dimensional Mo₂C nanosheets

Khazaei

Arai

Sasaki

et al. 2014

Science and Technology of Advanced Materials

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The experimental exfoliation of layered, ternary transition-metal carbide and nitride compounds, known as MAX phases, into two-dimensional (2D) nanosheets, is a great development in the synthesis of novel low-dimensional inorganic systems. Among the MAX phases, Mo-containing ones might be considered as the source for obtaining Mo2C nanosheets with potentially unique properties, if they could be exfoliated. Here, by using a set of first-principles calculations, we discuss the effect of the interlayer ‘A’ element on the exfoliation of Mo2AC (A = Al, Si, P, Ga, Ge, As or In) MAX phases into the 2D Mo2C nanosheets. Based on the calculated exfoliation energies and the elastic constants, we propose that Mo2InC with the lowest exfoliation energy and the highest elastic constant anisotropy between C11 and C33 might be a suitable compound for exfoliation into 2D Mo2C nanosheets.

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“…It is reported that Mo2C layers prepared by molten salts method facilitated excellent wettability between Mo2C-coated graphite and copper [7]. And copper was infiltrated into Mo2C-coated graphite foams by a pressureless infiltration method [8].…”

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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Mo2C intermediate layers for the wetting and infiltration of graphite foams by liquid copper

Cited by 40 publications

References 22 publications

Preparation of a C/C–Cu composite with Mo2C coatings as a modification interlayer

Preparation of a C/C–Cu composite with Mo2C coatings as a modification interlayer

The effect of the interlayer element on the exfoliation of layered Mo₂AC (A = Al, Si, P, Ga, Ge, As or In) MAX phases into two-dimensional Mo₂C nanosheets

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

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Mo2C intermediate layers for the wetting and infiltration of graphite foams by liquid copper

Cited by 40 publications

References 22 publications

Preparation of a C/C–Cu composite with Mo2C coatings as a modification interlayer

Preparation of a C/C–Cu composite with Mo2C coatings as a modification interlayer

The effect of the interlayer element on the exfoliation of layered Mo2AC (A = Al, Si, P, Ga, Ge, As or In) MAX phases into two-dimensional Mo2C nanosheets

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

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The effect of the interlayer element on the exfoliation of layered Mo₂AC (A = Al, Si, P, Ga, Ge, As or In) MAX phases into two-dimensional Mo₂C nanosheets