Oxidation behavior of high thermal conductivity mesophase-pitch-based carbon fibers

WANG Hao; WANG Gui; ZHOU Xingming; FAN Zhen; WU Huang; YE Chong; ZHANG Yuefeng; HUANG Dong

doi:10.13801/j.cnki.fhclxb.20221117.002

Volume 40 Issue 9

Sep. 2023

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WANG Hao, WANG Gui, ZHOU Xingming, et al. Oxidation behavior of high thermal conductivity mesophase-pitch-based carbon fibers[J]. Acta Materiae Compositae Sinica, 2023, 40(9): 5189-5200. doi: 10.13801/j.cnki.fhclxb.20221117.002

Citation:

WANG Hao, WANG Gui, ZHOU Xingming, et al. Oxidation behavior of high thermal conductivity mesophase-pitch-based carbon fibers[J]. Acta Materiae Compositae Sinica, 2023, 40(9): 5189-5200. doi: 10.13801/j.cnki.fhclxb.20221117.002

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Oxidation behavior of high thermal conductivity mesophase-pitch-based carbon fibers

doi: 10.13801/j.cnki.fhclxb.20221117.002

WANG Hao^{1, 3
,},
WANG Gui³,
ZHOU Xingming⁴,
FAN Zhen⁴,
WU Huang³,
YE Chong^{2, 3},
ZHANG Yuefeng^{2, 3},
HUANG Dong^{1, 2, 3
,
,}

1.
Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China
2.
Hunan Province Engineering Research Center for High Performance Pitch-based Carbon Materials, Hunan Toyi Carbon Material Technology CO., LTD., Changsha 410000, China
3.
College of Materials Science and Engineering, Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China
4.
Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, China

Funds: National Natural Science Foundation of China (U21 B2067; 52202037); Special Fund for Innovative Construction Province of Hunan (2020 GK4029); Natural Science Foundation of Hunan Province China (2021 JJ40144; 2021 JJ40145); Hunan Province Scientific and Technological Talents Support Project (2022 TJ-N11); Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology (2020 B1212060049); Changsha Municipal Science and Technology Project (KQ2102005); Ten Key Technical Projects of Hunan Province (2021 GK1140)

Received Date: 2022-09-21
Accepted Date: 2022-11-06
Rev Recd Date: 2022-10-27

Available Online: 2022-11-19

Publish Date: 2023-09-15

Abstract

Abstract

The oxidation behaviors of the homemade high thermal conductive mesophase-pitch-based carbon fiber (CF_MP) at different time and temperature were investigated using the polyacrylonitrile-based carbon fiber (M55J) as the control group. The results show that CF_MP exhibits a fold radiation structure in the outer part and onion skin structure in the inner part. The CF_MP has a well-developed graphite crystallite and a high degree of orientation. Oxygen atoms preferentially diffuse in the microcracks and micropores in the fold radiation carbon textures of CF_MP and react with them resulting in radial cracks and localized pits. In the low temperature oxidation stage, the oxidation behaviors of the fibers are controlled by the carbon-oxygen chemical reaction. Because the active site concentration in graphite crystallite of CF_MP is lower, its initial reaction temperature is higher than that of M55J, and its oxidation mass loss rate is relative lower. In the high temperature oxidation stage, the oxidation behaviors of the fibers are controlled by oxygen diffusion. The oxidation mass loss rate of CF_MP is higher than that of M55J because there are more oxygen diffusion paths in the CF_MP. Moreover, because there are more and larger microstructural defects in CF_MP after oxidation, the strength retention rate of the CF_MP is only 78%, which is lower than that of M55J (85%). This study provides certain technical and theoretical references for the structural design and actual service of high thermal conductive C/C composites.
- mesophase-pitch-based carbon fibers,
- high thermal conductivity,
- oxidation behavior,
- microstructure,
- C/C composites
Long Abstrsct
Innovation Points

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References(31)

References

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