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Mechanical and electrical properties of MCMB/Chopped carbon fiber composite with different bead size.

ABSTRACT: The carbonization and graphitization of carbon/carbon (C/C) composites prepared from mesocarbon microbeads (MCMB) and chopped carbon fiber (CCF) have been studied with a wide range of temperatures, CCF contents and MCMB sizes. Three different sizes of MCMB were prepared with coal tar pitch at three temperatures, 420, 430 and 440?°C, and identified as about 12.8, 16.0 and 20.1?µm, respectively. Each size of MCMB was mixed with CCFs at ratios of 2, 4, 6 and 8 wt. % and formed into block shape. After carbonization at 1200?°C, carbonized C/C blocks (CCBs) were graphitized at 2000, 2400 and 2800?°C. The CCB prepared with CCF content of 2 wt. % and an MCMB size of 16.0?µm exhibited the highest flexural strength of about 151?MPa. The graphitized C/C block (GCB) with CCF content of 2 wt. %, which was graphitized at 2000?°C showed the highest flexural strength of about 159?MPa.

SUBMITTER: Im US

PROVIDER: S-EPMC6506510 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature

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Mechanical and electrical properties of MCMB/Chopped carbon fiber composite with different bead size.

Im Ui-Su US Kim Jiyoung J Lee Byung-Rok BR Peck Dong-Hyun DH Jung Doo-Hwan DH

Scientific reports 20190508 1

The carbonization and graphitization of carbon/carbon (C/C) composites prepared from mesocarbon microbeads (MCMB) and chopped carbon fiber (CCF) have been studied with a wide range of temperatures, CCF contents and MCMB sizes. Three different sizes of MCMB were prepared with coal tar pitch at three temperatures, 420, 430 and 440 °C, and identified as about 12.8, 16.0 and 20.1 µm, respectively. Each size of MCMB was mixed with CCFs at ratios of 2, 4, 6 and 8 wt. % and formed into block shape. Aft ...[more]

PMID: 31068604

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