Effect of heat treatment temperature on properties of high thermal conductivity 3D C/C composites
The three-dimensional carbon fiber fabric was densified by chemical vapor infiltration and precursor impregnation cracking composite process, and the high thermal conductivity 3D C/C composite material with density of 1.95 g/cm<sup>3</sup> was obtained. Using SEM, XRD, thermal conductivi...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
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Journal of Materials Engineering
2021-09-01
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| Series: | Cailiao gongcheng |
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| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2020.001192 |
| _version_ | 1797969617447026688 |
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| author | RUAN Jia-miao LI Hong YAO Yu-min YANG Min REN Mu-su SUN Jin-liang |
| author_facet | RUAN Jia-miao LI Hong YAO Yu-min YANG Min REN Mu-su SUN Jin-liang |
| author_sort | RUAN Jia-miao |
| collection | DOAJ |
| description | The three-dimensional carbon fiber fabric was densified by chemical vapor infiltration and precursor impregnation cracking composite process, and the high thermal conductivity 3D C/C composite material with density of 1.95 g/cm<sup>3</sup> was obtained. Using SEM, XRD, thermal conductivity test, linear expansion coefficient test and three-point bending experiment to study the effect of different heat treatment temperatures of 2350,2550,2850℃ on the microscopic morphology,structure, thermal conductivity, linear expansion coefficient and bending performance of 3D C/C composites. The results show that with the increase of the heat treatment temperature, the mesophase pitch-based carbon fiber graphite sheet structure becomes more obvious, the order of the pyrolytic carbon sheets evenly wrapped around the carbon fiber increases, and the arrangement between the sheets becomes more dense; the graphitization and thermal conductivity of 3D C/C composite materials improve; in the test temperature range of 250-1400℃, the linear expansion coefficient increases slightly with the increase of the test temperature, and the 3D C/C composite after different heat treatment temperatures. The linear expansion coefficient of the materials is -1×10<sup>-6</sup>-2×10<sup>-6</sup>℃<sup>-1</sup>, showing good "zero expansion". In addition, when the heat treatment temperature increases, the bonding of the carbon fiber and the matrix of the 3D C/C composite materials are weakened, resulting in the decrease in the bending strength and flexural modulus of the materials. A large number of long fibers are pulled out on the bending fracture surface of the materials after the high temperature heat treatment at 2850℃. In general, the fracture after three different heat treatment temperatures shows "pseudoplastic" fracture characteristics. |
| first_indexed | 2024-04-11T03:05:08Z |
| format | Article |
| id | doaj.art-800ac0aea8ac40d7af741933dc7e2233 |
| institution | Directory Open Access Journal |
| issn | 1001-4381 |
| language | zho |
| last_indexed | 2024-04-11T03:05:08Z |
| publishDate | 2021-09-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-800ac0aea8ac40d7af741933dc7e22332023-01-02T13:24:54ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43812021-09-0149912813410.11868/j.issn.1001-4381.2020.00119220210914Effect of heat treatment temperature on properties of high thermal conductivity 3D C/C compositesRUAN Jia-miao0LI Hong1YAO Yu-min2YANG Min3REN Mu-su4SUN Jin-liang5Research Center of Composite Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaResearch Center of Composite Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaResearch Center of Composite Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaResearch Center of Composite Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaResearch Center of Composite Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaResearch Center of Composite Materials, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaThe three-dimensional carbon fiber fabric was densified by chemical vapor infiltration and precursor impregnation cracking composite process, and the high thermal conductivity 3D C/C composite material with density of 1.95 g/cm<sup>3</sup> was obtained. Using SEM, XRD, thermal conductivity test, linear expansion coefficient test and three-point bending experiment to study the effect of different heat treatment temperatures of 2350,2550,2850℃ on the microscopic morphology,structure, thermal conductivity, linear expansion coefficient and bending performance of 3D C/C composites. The results show that with the increase of the heat treatment temperature, the mesophase pitch-based carbon fiber graphite sheet structure becomes more obvious, the order of the pyrolytic carbon sheets evenly wrapped around the carbon fiber increases, and the arrangement between the sheets becomes more dense; the graphitization and thermal conductivity of 3D C/C composite materials improve; in the test temperature range of 250-1400℃, the linear expansion coefficient increases slightly with the increase of the test temperature, and the 3D C/C composite after different heat treatment temperatures. The linear expansion coefficient of the materials is -1×10<sup>-6</sup>-2×10<sup>-6</sup>℃<sup>-1</sup>, showing good "zero expansion". In addition, when the heat treatment temperature increases, the bonding of the carbon fiber and the matrix of the 3D C/C composite materials are weakened, resulting in the decrease in the bending strength and flexural modulus of the materials. A large number of long fibers are pulled out on the bending fracture surface of the materials after the high temperature heat treatment at 2850℃. In general, the fracture after three different heat treatment temperatures shows "pseudoplastic" fracture characteristics.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2020.0011923d c/c composite materialheat treatment temperaturemicroscopic morphologythermal conductivitybending property |
| spellingShingle | RUAN Jia-miao LI Hong YAO Yu-min YANG Min REN Mu-su SUN Jin-liang Effect of heat treatment temperature on properties of high thermal conductivity 3D C/C composites Cailiao gongcheng 3d c/c composite material heat treatment temperature microscopic morphology thermal conductivity bending property |
| title | Effect of heat treatment temperature on properties of high thermal conductivity 3D C/C composites |
| title_full | Effect of heat treatment temperature on properties of high thermal conductivity 3D C/C composites |
| title_fullStr | Effect of heat treatment temperature on properties of high thermal conductivity 3D C/C composites |
| title_full_unstemmed | Effect of heat treatment temperature on properties of high thermal conductivity 3D C/C composites |
| title_short | Effect of heat treatment temperature on properties of high thermal conductivity 3D C/C composites |
| title_sort | effect of heat treatment temperature on properties of high thermal conductivity 3d c c composites |
| topic | 3d c/c composite material heat treatment temperature microscopic morphology thermal conductivity bending property |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2020.001192 |
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