Effect of molybdenum particles on thermal and mechanical properties of graphite flake/copper composites

Cui, Qianyue; Chen, Cunguang; Yu, Chengwei; Lu, Tianxing; Long, Hu; Yan, Shuhao; Volinsky, Alex A.

doi:10.1016/j.carbon.2020.01.059

Cited by 35 publications

(15 citation statements)

References 51 publications

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“…The obtained lower XY-CTE of the FG/Cu-Zr composites benefited from the increased effective contact area, which ascribed the strengthened interface. As reported in our previous study [28], it is found that the interlayer sliding fracture of FGs was an important reason for the large XY-CTE.…”

Section: Thermal Propertiessupporting

confidence: 78%

“…As a result, the free-dispersed Zr in the copper matrix diffused and reacted with Cu along the grain boundary at high temperature, generating Zr circles in the 2D projection as pointed out by white arrows in Figure 7 a. The grain size of Cu matrix is less than 10 μm as seen in Figure 7 c, which are much smaller than our previous study (greater than 20 μm) [ 28 ]. Combined with the small amount of residual carbon (blue dots) detected by EBSD, it could be suggested that the residual carbon contributes to the refined grains of copper matrix.…”

Section: Resultsmentioning

confidence: 74%

“…The EDS results show that the mass fraction of Zr and Cu was 73.59 wt % and 26.41 wt %, respectively. The components of the organic system used for tape-casting included ethanol (analytical reagent), polyvinyl butyral (PVB, analytical reagent), and dibutyl phthalate (DBP, analytical reagent) [ 28 ]. The FG/Cu-Zr composites were prepared by the typical method of powder metallurgy.…”

Section: Methodsmentioning

confidence: 99%

“…To solve the above problems, two prevalent approaches of matrix alloying and coatings on carbon surface have been carried out [ 9 , 10 , 15 , 16 , 17 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. Matrix alloying was often used in liquid infiltration.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Zr-Cu Alloy Powder on Microstructure and Properties of Cu Matrix Composite with Highly-Aligned Flake Graphite

Cui

Yu²,

et al. 2020

Materials

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Highly-aligned flake graphite (FG) reinforced Cu matrix composites with high thermal conductivity and adaptive coefficient of thermal expansion were successfully prepared via the collaborative process of tape-casting and hot-pressing sintering. To overcome the problem of fragile interface, Zr-Cu alloy powder was introduced instead of pure Zr powder to enhance the interfacial strength, ascribed to the physical-chemical bonding at the Cu-FG interface. The results indicate that the synthetic ZrC as interfacial phase affects the properties of FG/Cu composites. The thermal conductivity reaches the maximum value of 608.7 W/m∙K (52% higher than pure Cu) with 0.5 wt % Zr. Surprisingly, the negative coefficient of thermal expansion (CTE) in the Z direction is acquired from −7.61 × 10−6 to −1.1 × 10−6/K with 0 to 2 wt % Zr due to the physical mechanism of strain-engineering of the thermal expansion. Moreover, the CTE in X-Y plane with Zr addition is 8~10 × 10−6/K, meeting the requirements of semiconductor materials. Furthermore, the bending strength of the FG/Cu-2 wt % Zr composite is 42% higher than the FG/Cu composite. Combining excellent thermal conductivity with ultralow thermal expansion make the FG/Cu-Zr composites be a highly promising candidate in the electronic packaging field.

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Section: Thermal Propertiessupporting

confidence: 78%

Section: Resultsmentioning

confidence: 74%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Zr-Cu Alloy Powder on Microstructure and Properties of Cu Matrix Composite with Highly-Aligned Flake Graphite

Cui

Yu²,

et al. 2020

Materials

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“…Although the use of graphite flake/copper composites has made good progress in thermal conductivity and thermal expansion performance, the mechanical properties of graphite/copper composites are very poor due to the poor mechanical properties of graphite flakes. Researchers [13][14][15][16] developed two methods to improve the mechanical properties, namely, reinforcement surface modification and matrix alloying. Bai [13] improved the mechanical properties of graphite flake/copper composites from 50 MPa to 80 MPa by coating the surface of the flakes with a SiC layer.…”

Section: Introductionmentioning

confidence: 99%

Preparation and thermophysical properties of graphite flake-carbon fiber coreinforced copper matrix composites

Huang

Miao

Chen

et al. 2021

Mater. Res. Express

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Graphite flake-carbon fiber coreinforced copper matrix composites were prepared by vacuum hot pressing technology. The carbon fibers were dispersed ultrasonic in alcohol and then mixed with graphite flake and alloys powder（Zr and Cu）for hot pressing sintering. The effects of the carbon fiber content on the microstructure, bending strength and thermal conductivity of the composites were investigated. The results show that the interface of the composites is well bonded. When the volume fraction of carbon fiber is 1%-3%, the carbon fiber can be uniformly dispersed in the matrix, and the bending strength of the composites can be improved effectively. When the volume fraction of carbon fiber is 2%, the bending strength reaches a maximum of 152 MPa, which is an increase of 60% compared with that of the composites without carbon fiber. However, an excessive addition of carbon fiber (4% or more) leads to an uneven distribution of carbon fiber, and the bending strength of the composites decreases. When the volume fraction of carbon fiber is 2%, the thermal conductivity of the composite is 597 W·m-1·K-1. The acoustic mismatch model (AMM) associated with the Digimat MF module is able to predict the thermal conductivity of the anisotropic multiphase composites.

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Hot deformation behavior and finite element simulation of hot isostatic pressed Mo-50Cu composite

et al. 2022

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Effect of molybdenum particles on thermal and mechanical properties of graphite flake/copper composites

Cited by 35 publications

References 51 publications

Effects of Zr-Cu Alloy Powder on Microstructure and Properties of Cu Matrix Composite with Highly-Aligned Flake Graphite

Effects of Zr-Cu Alloy Powder on Microstructure and Properties of Cu Matrix Composite with Highly-Aligned Flake Graphite

Preparation and thermophysical properties of graphite flake-carbon fiber coreinforced copper matrix composites

Hot deformation behavior and finite element simulation of hot isostatic pressed Mo-50Cu composite

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