Improving the mechanical strength of carbon–carbon composites by oxidative stabilization

Ji Hong Kim; A. Young Jo; Yun Jeong Choi; Ki Bong Lee; Ji Sun Im; Byong Chol Bai

doi:10.1016/j.jmrt.2020.11.064

Improving the mechanical strength of carbon–carbon composites by oxidative stabilization

Ji Hong Kim, A. Young Jo, Yun Jeong Choi, Ki Bong Lee, Ji Sun Im, Byong Chol Bai

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

Carbon/carbon composite has superior properties, so it has been expected to use various industrial fields. However, low mechanical strength (than conventional structural materials) works as a hurdle, so the use of oxidative stabilization to improve the mechanical strength of carbon/carbon composites was studied. The oxidation process was performed at 220–350 °C based on thermogravimetric analysis (TGA). The compressive strength of the oxidized sample at 290 °C was 212 MPa, which is 2.5 times greater than that of the non-oxidized sample (84 MPa). However, the oxidation temperature of more than 290 °C decreased the compressive strength (199 MPa at 350 °C). This tendency was in accordance with the TGA and X-ray photoelectron spectroscopy (XPS) results. The effect of oxidative stabilization can be explained by two factors: the polymerization of the used binder pitch by the crosslinking effect by induced oxygen and improvement of the affinity between the coke and binder pitch.

Original language	English
Pages (from-to)	16513-16521
Number of pages	9
Journal	Journal of Materials Research and Technology
Volume	9
Issue number	6
DOIs	https://doi.org/10.1016/j.jmrt.2020.11.064
Publication status	Published - 2020 Nov 1

Bibliographical note

Funding Information:
The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: This work was supported by the Technology Innovation Program (20006696, Development of isotropic graphite block for semiconductor process) funded By the Ministry of Trade, Industry & Energy (MOTIE, Korea).

Publisher Copyright:
© 2020 The Author(s)

Keywords

Carbon–carbon composite
Coke/pitch affinity
Mechanical strength
Oxidative stabilization
Oxygen crosslinking

ASJC Scopus subject areas

Ceramics and Composites
Biomaterials
Surfaces, Coatings and Films
Metals and Alloys

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10.1016/j.jmrt.2020.11.064

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abstract = "Carbon/carbon composite has superior properties, so it has been expected to use various industrial fields. However, low mechanical strength (than conventional structural materials) works as a hurdle, so the use of oxidative stabilization to improve the mechanical strength of carbon/carbon composites was studied. The oxidation process was performed at 220–350 °C based on thermogravimetric analysis (TGA). The compressive strength of the oxidized sample at 290 °C was 212 MPa, which is 2.5 times greater than that of the non-oxidized sample (84 MPa). However, the oxidation temperature of more than 290 °C decreased the compressive strength (199 MPa at 350 °C). This tendency was in accordance with the TGA and X-ray photoelectron spectroscopy (XPS) results. The effect of oxidative stabilization can be explained by two factors: the polymerization of the used binder pitch by the crosslinking effect by induced oxygen and improvement of the affinity between the coke and binder pitch.",

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AU - Im, Ji Sun

AU - Bai, Byong Chol

N1 - Funding Information: The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: This work was supported by the Technology Innovation Program (20006696, Development of isotropic graphite block for semiconductor process) funded By the Ministry of Trade, Industry & Energy (MOTIE, Korea). Publisher Copyright: © 2020 The Author(s)

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N2 - Carbon/carbon composite has superior properties, so it has been expected to use various industrial fields. However, low mechanical strength (than conventional structural materials) works as a hurdle, so the use of oxidative stabilization to improve the mechanical strength of carbon/carbon composites was studied. The oxidation process was performed at 220–350 °C based on thermogravimetric analysis (TGA). The compressive strength of the oxidized sample at 290 °C was 212 MPa, which is 2.5 times greater than that of the non-oxidized sample (84 MPa). However, the oxidation temperature of more than 290 °C decreased the compressive strength (199 MPa at 350 °C). This tendency was in accordance with the TGA and X-ray photoelectron spectroscopy (XPS) results. The effect of oxidative stabilization can be explained by two factors: the polymerization of the used binder pitch by the crosslinking effect by induced oxygen and improvement of the affinity between the coke and binder pitch.

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Improving the mechanical strength of carbon–carbon composites by oxidative stabilization

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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