Thermophysical properties of annealed graphite/6061 aluminum alloy composites

ZHANG Yuxiang; GUO Hong; XIE Zhongnan; ZHANG Ximin; HUANG Guojie; XIE Haofeng

doi:10.13801/j.cnki.fhclxb.20220217.001

Volume 40 Issue 1

Jan. 2023

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ZHANG Yuxiang, GUO Hong, XIE Zhongnan, et al. Thermophysical properties of annealed graphite/6061 aluminum alloy composites[J]. Acta Materiae Compositae Sinica, 2023, 40(1): 455-463. doi: 10.13801/j.cnki.fhclxb.20220217.001

Citation:

ZHANG Yuxiang, GUO Hong, XIE Zhongnan, et al. Thermophysical properties of annealed graphite/6061 aluminum alloy composites[J]. Acta Materiae Compositae Sinica, 2023, 40(1): 455-463. doi: 10.13801/j.cnki.fhclxb.20220217.001

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Thermophysical properties of annealed graphite/6061 aluminum alloy composites

doi: 10.13801/j.cnki.fhclxb.20220217.001

ZHANG Yuxiang^{1, 2, 3},
GUO Hong^{1, 2
,
,},
XIE Zhongnan^{1, 2},
ZHANG Ximin^{1, 2},
HUANG Guojie^{1, 2},
XIE Haofeng^{1, 2}

1.
State Key Laboratory of Nonferrous Metals and Processes, GRINM Group CO., LTD., Beijing 100088, China
2.
GRIMAT Engineering Institute CO., LTD., Beijing 101407, China
3.
General Research Institute for Nonferrous Metals, Beijing 100088, China

Funds: Youth Fund of GRINM Group CO., LTD. (12388); National Key R & D Program of China (2017YFB0406202)

Received Date: 2021-12-09
Accepted Date: 2022-02-06
Rev Recd Date: 2022-01-10

Available Online: 2022-02-18

Publish Date: 2023-01-15

Abstract

Abstract

As the heat flux density of electronic devices continues to increase, the hot spots caused by heat accumulation seriously affect the performance and application devices. In this study, annealed graphite (APG)/6061 Al with different graphite layer thickness ratios were prepared using vacuum hot-press method. To enhance the wettability between the annealed graphite and aluminum alloy, annealed graphite was coated with a thin layer of titanium by vacuum micro-evaporation plating, which proved to be effective and efficient. The influence of titanium modification on the microstructure and interface bonding of annealed graphite/aluminum composites was discussed, and the effect of the annealed graphite/aluminum layer thickness ratio on the overall thermal and mechanical properties of the composite was studied. Similarly, the results show that a 400 nm thick interface layer is formed between the annealed graphite and aluminum, and the directionally annealed graphite material modified by titanium is in close contact with aluminum. As the thickness ratio of each phase of Al∶APG∶Al is 1∶3∶1, the composite material has a thermal diffusion coefficient of 901 mm²·s⁻¹ in the in-plane direction and the maximum flexural strength of the composite material is 141 MPa.
- annealedgraphite/aluminum composite,
- layered composite,
- interface integration,
- thermal diffusivity,
- bending strength
Long Abstrsct
Innovation Points

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References(35)

References

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