Thermal conduction and tribological properties of carbon/carbon composites densified by xylene pyrolysis using La as a catalyst

DENG Hai-liang; ZHENG Jin-huang; YIN Zhong-yi; YAO Dong-mei; SU Hong; ZHANG Xiao-hu; SI Song-hua

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Article Navigation > New Carbon Mater. > 2020 > 35(1): 80-86

DENG Hai-liang, ZHENG Jin-huang, YIN Zhong-yi, YAO Dong-mei, SU Hong, ZHANG Xiao-hu, SI Song-hua. Thermal conduction and tribological properties of carbon/carbon composites densified by xylene pyrolysis using La as a catalyst. New Carbon Mater., 2020, 35(1): 80-86.

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Thermal conduction and tribological properties of carbon/carbon composites densified by xylene pyrolysis using La as a catalyst

1.
School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China;
2.
Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Ministry of Education, Anhui University of Technology, Maanshan 243002, China;
3.
Xi'an Aerospace Composite Research Institute, Xi'an 710025, China

Funds: National Natural Science Foundation of China (51972002); Equipment Advanced Research Foundation of China (9140A12060514HT43190).

Received Date: 2019-11-10
Accepted Date: 2020-04-02
Rev Recd Date: 2020-02-01
Publish Date: 2020-02-29

Abstract

Abstract

Carbon/carbon composites with densities of 1.72-1.73 g/cm³ were fabricated by film boiling chemical vapor infiltration of a needle-pierced preform using xylene as a carbon precursor and LaCl₃ as a catalyst, followed by resin impregnation and graphitization. The effects of the catalyst content on the thermal conduction and tribological properties of the composites were investigated by SEM, thermal tests with a laser flash instrument, and friction tests. Results showed that the thermal conductivities in the through thickness and in-plane directions, the friction coefficient, and the wear rate all had maxima at 6 wt% for LaCl₃ contents from 0 to 15 wt%. The maximum thermal conductivities were about 58.5 and 75.6% higher than those of the composites without a catalyst in the through thickness and in-plane directions, respectively. A smooth friction film was most easily formed on the friction surface of the composite fabricated with a 6 wt% catalyst content, resulting in the lowest coefficient of friction and wear rate as well as the highest braking stability.
- C/C composites,
- Rare earth La,
- Thermal conductivity,
- Tribological behavior

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References(20)

References

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