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A platform for research: civil engineering, architecture and urbanism
High-thermal-conductivity unidirectional carbon/carbon composite material and preparation method thereof
The invention discloses a high-thermal-conductivity unidirectional carbon/carbon composite material and a preparation method thereof.The preparation method comprises the steps that carbon fiber bundles are spread to be flat, and flat carbon fiber bundles are obtained; arranging the flat carbon fiber bundles in parallel, and weaving to obtain carbon fiber cloth; depositing pyrolytic carbon on the carbon fiber cloth; carrying out pre-graphitization treatment on the carbon fiber cloth deposited with the pyrolytic carbon; laminating a preset number of layers of the pre-graphitized carbon fiber cloth to obtain a preform; the flat carbon fiber bundles are arranged in a brick-imitating structure; and clamping the preform in the thickness direction, compacting the deposited pyrolytic carbon of the preform, and then carrying out graphitization treatment to obtain the high-thermal-conductivity unidirectional carbon/carbon composite material. By regulating and designing the structures and the arrangement modes of the fiber bundles and the unidirectional fiber cloth, the cross-scale structural design on the microcosmic-mesoscopic-macroscopic scale is realized, and the unidirectional C/C composite material with high heat conductivity, high bearing capacity and ultra-light weight is obtained.
本发明公开了一种高导热单向碳/碳复合材料及其制备方法，将碳纤维束进行展丝，使碳纤维束呈扁平状，得到扁平状碳纤维束；将扁平状碳纤维束平行排列、进行织布，得到碳纤维布；对碳纤维布沉积热解碳；将沉积热解碳的碳纤维布进行预石墨化处理；将预设层数的预石墨化处理后的碳纤维布进行层叠，得到预制体；扁平状碳纤维束呈仿砖砌结构布置；将预制体沿厚度方向夹紧，并对预制体沉积热解碳进行致密化，之后再进行石墨化处理，得到高导热单向碳/碳复合材料。通过对纤维束、单向纤维布的结构和排布方式进行调控与设计，实现微观‑介观‑宏观尺度上的跨尺度结构设计，得到了具有高导热、高承载和超轻质的单向C/C复合材料。
High-thermal-conductivity unidirectional carbon/carbon composite material and preparation method thereof
The invention discloses a high-thermal-conductivity unidirectional carbon/carbon composite material and a preparation method thereof.The preparation method comprises the steps that carbon fiber bundles are spread to be flat, and flat carbon fiber bundles are obtained; arranging the flat carbon fiber bundles in parallel, and weaving to obtain carbon fiber cloth; depositing pyrolytic carbon on the carbon fiber cloth; carrying out pre-graphitization treatment on the carbon fiber cloth deposited with the pyrolytic carbon; laminating a preset number of layers of the pre-graphitized carbon fiber cloth to obtain a preform; the flat carbon fiber bundles are arranged in a brick-imitating structure; and clamping the preform in the thickness direction, compacting the deposited pyrolytic carbon of the preform, and then carrying out graphitization treatment to obtain the high-thermal-conductivity unidirectional carbon/carbon composite material. By regulating and designing the structures and the arrangement modes of the fiber bundles and the unidirectional fiber cloth, the cross-scale structural design on the microcosmic-mesoscopic-macroscopic scale is realized, and the unidirectional C/C composite material with high heat conductivity, high bearing capacity and ultra-light weight is obtained.
本发明公开了一种高导热单向碳/碳复合材料及其制备方法，将碳纤维束进行展丝，使碳纤维束呈扁平状，得到扁平状碳纤维束；将扁平状碳纤维束平行排列、进行织布，得到碳纤维布；对碳纤维布沉积热解碳；将沉积热解碳的碳纤维布进行预石墨化处理；将预设层数的预石墨化处理后的碳纤维布进行层叠，得到预制体；扁平状碳纤维束呈仿砖砌结构布置；将预制体沿厚度方向夹紧，并对预制体沉积热解碳进行致密化，之后再进行石墨化处理，得到高导热单向碳/碳复合材料。通过对纤维束、单向纤维布的结构和排布方式进行调控与设计，实现微观‑介观‑宏观尺度上的跨尺度结构设计，得到了具有高导热、高承载和超轻质的单向C/C复合材料。
High-thermal-conductivity unidirectional carbon/carbon composite material and preparation method thereof
一种高导热单向碳/碳复合材料及其制备方法
SONG QIANG (author) / ZHANG RUOQIAN (author) / SHEN QINGLIANG (author) / XUE ZHENGHANG (author) / ZHANG SHOUYANG (author) / LI WEI (author) / FU QIANGANG (author) / LI HEJUN (author)
2024-06-11
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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Thermal conductivity of unidirectional carbon/carbon composites with different carbon matrixes
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