Fabrication, interface characterization and modeling of oriented graphite flakes/Si/Al composites for thermal management applications

Zhou, Chong‐song; Ji, Gang; Chen, Zhe; Wang, Mingliang; Addad, Ahmed; Schryvers, D.; Wang, Haowei

doi:10.1016/j.matdes.2014.07.009

Cited by 108 publications

(40 citation statements)

References 48 publications

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“…Therefore, it is possible that the carbon in the shot tip oil reacts with the following molten Al to form carbides (Al 4 C 3 ), when the molten Al is injected into the die cavity through a shot sleeve by a plunger forcing (see Fig. 7(b) and (c)) [21,22].…”

Section: Resultsmentioning

confidence: 99%

A cluster of inclusions on Al–Si–Cu die casting cylinder block

Guan

Zhao

Zhao³

et al. 2015

Engineering Failure Analysis

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Section: Resultsmentioning

confidence: 99%

A cluster of inclusions on Al–Si–Cu die casting cylinder block

Guan

Zhao

Zhao³

et al. 2015

Engineering Failure Analysis

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“…Secondly, referring to Nakada and Ishii's work [30], Al and Si, with atomic ratio < 50% adsorption, are stable at different sites and are adsorbed relatively weakly (physisorbed) on graphene, thus they do not disrupt the graphene structure significantly. Furthermore, the study of Al adsorbed on graphene can serve as a case for graphene-metal contact which is essential for applying graphene in electronic/mechanical devices [32][33][34]. Whilst the study of Si adsorbed on graphene can loosely be related to the study of graphene growth on SiC [35].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Geometrical and orientational investigations on the electronic structure of graphene with adsorbed aluminium or silicon

et al. 2016

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orientational investigations on the electronic structure of graphene with adsorbed aluminium or silicon, (2015), doi: 10.1016/j.matdes.2015.09.111 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. In this contribution, we deployed DFT periodic slab calculations to investigate effect of orientational dependence of Al-and Si-adsorbed graphene systems. We utilized 2 × 2 and 2 × 3 graphene supercells with 1:8 (Al, Si : C) atomic ratios. We observed that the relative orientation of adsorbent atoms exerts profound influence on electronic structures in conjunction with a matching effect caused by the distinct adsorption sites (i.e. bridge, hollow or top). The orientation effects of Si-adsorbed graphene on electronic structure are greater than their Al analogous structures. We anticipate our finding herein, of low adatom concentration on graphene, to prompt re-examination of metal-graphene systems to account for the previously unnoticed -but significant -orientational effect that adds an additional degree of freedom to elemental adsorption on graphene.

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“…2.68 0.890 [14,15] 151 [14,15] - [a] Parallel to the graphite layers; [b] perpendicular to the graphite layers.…”

Section: Raw Materials and Fabrication Processmentioning

confidence: 99%

“…The thermal diffusivity of Gr-Al composites in a direction parallel to the graphite layers is much higher than that in a direction perpendicular to the graphite layers. [14][15][16] Therefore, thermal diffusivity of composites is focused on the direction parallel to the graphite layers. The specific heat capacity of the Gr-Al composites decreases from 0.818 to 0.746 J (g K) À1 with an increase of the V Gr from 40 to 80%.…”

Section: Microstructure Of the Gr-al Compositesmentioning

confidence: 99%

“…The most important thing is Gr-Al composites have excellent thermal characteristics, which can meet packaging requirements of devices, and thus they are expected to become the new generation of electronic packaging materials. [14,15] At present, the main approach for the preparation of high volume fraction Gr-Al composites is powder metallurgy, [12,16] which can accurately adjust the volume fraction of graphite, as a result, material performance can be adjusted and controlled. In addition, the components with complicated shapes and high forming precision can be prepared through powder metallurgy.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis by Vacuum Infiltration, Microstructure, and Thermo‐Physical Properties of Graphite–Aluminum Composite

Huang

et al. 2016

Adv Eng Mater

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Graphite prefabricated blocks are fabricated using natural flake graphite and pore-forming agent of urea, and then high volume fraction graphite-aluminum (Gr-Al) composites are fabricated applying graphite prefabricated blocks and aluminum alloy (ZL101) by vacuum infiltration process for the electronic packaging materials. The microstructures of graphite prefabricated block and Gr-Al composites are observed in detail, which shows that the graphite maintains a good integrity and arranges uniformly in aluminum alloy. Besides, the result shows the formation of a tightly adhered interface between the side surfaces of the graphite and aluminum alloy matrix, and no detrimental Al 4 C 3 phase is found. Thermal properties of Gr-Al composites are researched perpendicularly to the pressing direction. Thermal conductivity increases from 282 to 398 W mK À1 whereas the volume fraction of flake graphite increases from 40 to 75% in the composites, this reveals that the vacuum infiltration is a very promising method to synthesize Gr-Al composites.

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Fabrication, interface characterization and modeling of oriented graphite flakes/Si/Al composites for thermal management applications

Cited by 108 publications

References 48 publications

A cluster of inclusions on Al–Si–Cu die casting cylinder block

A cluster of inclusions on Al–Si–Cu die casting cylinder block

Geometrical and orientational investigations on the electronic structure of graphene with adsorbed aluminium or silicon

Synthesis by Vacuum Infiltration, Microstructure, and Thermo‐Physical Properties of Graphite–Aluminum Composite

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