| Autor: |
YAO Yu-min, LI Hong, LIU Zheng-qi, YANG Min, REN Mu-su, SUN Jin-liang |
| Jazyk: |
čínština |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Cailiao gongcheng, Vol 48, Iss 11, Pp 155-161 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
1001-4381 |
| DOI: |
10.11868/j.issn.1001-4381.2019.000250 |
| Popis: |
Porous carbon/carbon (C/C) composites prepared by pitch-based carbon fiber and mesophase pitch were densified by chemical vapor infiltration (CVI) and precursor impregnation process (PIP). After different heat temperature treatment (HTT), the unidirectional C/C composites and bidirectional C/C composites were obtained. The microstructure of C/C composites was investigated by SEM, XRD, and the thermal conductivity was analyzed based on the thermal conductivity mechanism. The results show that unidirectional C/C composites and bidirectional C/C composites have dense structures and excellent thermal conductivity along the fiber axis. After 3000 ℃ treatment, the structure of graphite flat layers become more distinct and the graphitization degree is increased by 18.84%, leading to higher thermal conductivity. Furthermore, the thermal conductivity in X direction and Y direction of the bidirectional C/C composites can be calculated from that of unidirectional C/C composites in X direction and Z direction. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
