Thermal properties of aluminum–graphite composites by powder metallurgy

Chen, Jhewn‐Kuang; Huang, In-Lin

doi:10.1016/j.compositesb.2012.01.083

Cited by 194 publications

(109 citation statements)

References 23 publications

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“…Generally, two main processes used to fabricate self-lubricating aluminum composites are (a) solid state processing [76,78,82,[99][100][101][102] and (b) liquid state processing [32,61,63,64,66,80,90,103,104]. The process that is employed to fabricate self-lubricating composites has an effect on the tribological behavior of composites due to variations in microstructure, distribution of graphite, and bonding between matrix and graphite, depending on the process used to manufacture the composites.…”

Section: Aluminum-graphite Compositesmentioning

confidence: 99%

“…8 [129]. Akhlaghi et al [101] also compared the wear rate and friction coefficient of an Al/Gr composite with a hybrid Al/SiC/Gr composite containing 0, 20, and 40 vol% SiC and 9 vol% graphite. A significant improvement in wear performance of the hybrid composite was observed.…”

Section: Materials Variablesmentioning

confidence: 99%

“…In general term, the thickness of the Fig. 9 Dependence between hybrid composites' a wear rate and b friction coefficient with graphite content [101] Fig. 10 Effect of ceramic particle content on self-lubricating hybrid metal matrix composite at different sliding distance [128] lubricating film at the interface increases with increasing graphite content, which subsequently reduce asperity contact [120].…”

Section: Graphite Volume Fractionmentioning

confidence: 99%

See 2 more Smart Citations

Influences of graphite reinforcement on the tribological properties of self-lubricating aluminum matrix composites for green tribology, sustainability, and energy efficiency—a review

Omrani

Moghadam

Menezes

et al. 2015

Int J Adv Manuf Technol

143

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Aluminum/graphite (Al/Gr) composites have been used as self-lubricating materials due to the superior lubricating effect of graphite during sliding. This paper summarizes various tribological aspects of self-lubricating aluminum composites. The influence of various factors such as (a) material factors, graphite size and volume fraction, and (b) mechanical factors, applied load and sliding speed on the tribological properties of self-lubricating aluminum composites, is discussed. Furthermore, the tribological properties of selflubricating composites as a function of these parameters and the active wear mechanism involved in various systems are discussed. Bringing self-lubricating composites into different operating systems is a solution to reduce the use of external toxic petroleum-based lubricants in sliding contacts in a way to help the environment and reduce energy dissipation in industrial components for strategies toward sustainability and energy efficiency.

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Section: Aluminum-graphite Compositesmentioning

confidence: 99%

Section: Materials Variablesmentioning

confidence: 99%

Section: Graphite Volume Fractionmentioning

confidence: 99%

See 1 more Smart Citation

Influences of graphite reinforcement on the tribological properties of self-lubricating aluminum matrix composites for green tribology, sustainability, and energy efficiency—a review

Omrani

Moghadam

Menezes

et al. 2015

Int J Adv Manuf Technol

143

View full text Add to dashboard Cite

show abstract

“…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%

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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The Effect of Graphite Flake Volume Fraction on the Thermophysical Proper Ties of Graphite Flake/Aluminum Composites

Chi,

Du,

Sun

et al. 2024

Adv Eng Mater

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Vacuum hot‐press sintering process is utilized to manufacture graphite flake/aluminum composites, and the influence of graphite flake volume fraction on the microscopic structure, hardness, thermal conductivity (TC) and coefficient of thermal expansion (CTE) of the composites are investigated. The results indicate that the graphite flakes are neatly aligned along the in‐plane direction in the composites and exhibit a strong bond with the aluminum matrix interface. The in‐plane TC of the composite significantly increase with the addition of graphite flakes, whereas hardness, through‐plane TC, and the CTE decrease. As the volume fraction of graphite flakes in the composites increase from 15% to 60%, in‐plane TC improve from 278.8 to 353.8 W m–1 K–1, through‐plane TC decrease from 164.4 to 33.2 W m–1 K–1, and the CTE decrease to 13.7 × 10–6 K–1, achieving high thermal conductivity and a low coefficient of thermal expansion.This article is protected by copyright. All rights reserved.

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Thermal properties of aluminum–graphite composites by powder metallurgy

Cited by 194 publications

References 23 publications

Influences of graphite reinforcement on the tribological properties of self-lubricating aluminum matrix composites for green tribology, sustainability, and energy efficiency—a review

Influences of graphite reinforcement on the tribological properties of self-lubricating aluminum matrix composites for green tribology, sustainability, and energy efficiency—a review

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

The Effect of Graphite Flake Volume Fraction on the Thermophysical Proper Ties of Graphite Flake/Aluminum Composites

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