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

被引：19

作者：

Kim, Ji Hong ^{[1
,2
]}

Jo, A. Young ^{[3
]}

Choi, Yun Jeong ^{[1
,4
]}

Lee, Ki Bong ^{[2
]}

Im, Ji Sun ^{[1
,5
]}

Bai, Byong Chol ^{[6
]}

机构：

[1] Korea Res Inst Chem Technol KRICT, C1 Gas & Carbon Convergent Res Ctr, Daejeon 34114, South Korea

[2] Korea Univ, Dept Chem & Biol Engn, Seoul 02841, South Korea

[3] Korea Inst Carbon Convergence Technol KCTECH, Reliabil Anal Res Ctr, Jeonju 54853, South Korea

[4] Chungnam Natl Univ, Dept Chem Engn & Appl Chem, Daejeon 34134, South Korea

[5] Univ Sci & Technol UST, Daejeon 34113, South Korea

[6] Korea Inst Convergence Text, Iksan Si 54588, South Korea

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2020年 / 9卷 / 06期

关键词：

Carbon-carbon composite; Oxidative stabilization; Mechanical strength; Oxygen crosslinking; Coke/pitch affinity; ISOTROPIC PITCH PRECURSORS; COAL-TAR; THERMAL-CONDUCTIVITY; FIBERS GPCF; COKE; BLOCKS; OIL; DISC;

D O I：

10.1016/j.jmrt.2020.11.064

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 degrees C based on thermogravimetric analysis (TGA). The compressive strength of the oxidized sample at 290 degrees 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 degrees C decreased the compressive strength (199 MPa at 350 degrees 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. (C) 2020 The Author(s). Published by Elsevier B.V.

引用

页码：16513 / 16521

页数：9

共 29 条

[11] Influence of kneading ratio on the binding interaction of coke aggregates on manufacturing a carbon block [J].