Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-thermal-conductivity thin-wall unidirectional carbon/carbon composite material and preparation method thereof
The invention discloses a high-thermal-conductivity thin-wall one-way carbon/carbon composite material and a preparation method thereof. The preparation method comprises the following steps: preparing non-woven cloth from expanded first mesophase pitch-based carbon fiber bundles; weaving fiber bundles formed by spreading the second mesophase pitch-based carbon fiber bundles along the weft direction of the non-woven cloth to obtain mesophase pitch-based carbon fiber cloth; pyrolytic carbon is pre-deposited on the mesophase pitch-based carbon fiber cloth, and the pretreated mesophase pitch-based carbon fiber cloth is obtained; the pretreated mesophase pitch-based carbon fiber cloth is laid and pressed in the thickness direction, and a one-way prefabricated body is obtained; and densifying the unidirectional preform by using a chemical vapor infiltration process, and then carrying out graphitization heat treatment to obtain the high-thermal-conductivity thin-wall unidirectional carbon/carbon composite material after the graphitization heat treatment is completed. The invention aims to optimize the structure of the one-way preform by weaving the fiber bundles along the radial direction of the fiber so as to enhance the bonding strength between the fiber bundles, avoid the cracking phenomenon between the bundles and finally realize the preparation of the large-size thin-wall C/C composite material component.
本发明公开了一种高导热薄壁单向碳/碳复合材料及其制备方法，通过展丝后的第一中间相沥青基碳纤维束制备无纬布；沿着无纬布纬向编织由第二中间相沥青基碳纤维束展丝成的纤维束，得到中间相沥青基碳纤维布；对中间相沥青基碳纤维布预沉积热解碳，得到预处理后的中间相沥青基碳纤维布；将预处理后的中间相沥青基碳纤维布进行铺层并沿厚度方向压紧，得到单向预制体；将单向预制体利用化学气相渗透工艺进行致密化，之后再进行石墨化热处理，石墨化热处理完成后得到高导热薄壁单向碳/碳复合材料。本发明旨在通过沿纤维径向编织纤维束对单向预制体进行结构优化，以增强纤维束间结合强度，避免束间开裂现象，最终实现大尺寸薄壁C/C复合材料构件的制备。
High-thermal-conductivity thin-wall unidirectional carbon/carbon composite material and preparation method thereof
The invention discloses a high-thermal-conductivity thin-wall one-way carbon/carbon composite material and a preparation method thereof. The preparation method comprises the following steps: preparing non-woven cloth from expanded first mesophase pitch-based carbon fiber bundles; weaving fiber bundles formed by spreading the second mesophase pitch-based carbon fiber bundles along the weft direction of the non-woven cloth to obtain mesophase pitch-based carbon fiber cloth; pyrolytic carbon is pre-deposited on the mesophase pitch-based carbon fiber cloth, and the pretreated mesophase pitch-based carbon fiber cloth is obtained; the pretreated mesophase pitch-based carbon fiber cloth is laid and pressed in the thickness direction, and a one-way prefabricated body is obtained; and densifying the unidirectional preform by using a chemical vapor infiltration process, and then carrying out graphitization heat treatment to obtain the high-thermal-conductivity thin-wall unidirectional carbon/carbon composite material after the graphitization heat treatment is completed. The invention aims to optimize the structure of the one-way preform by weaving the fiber bundles along the radial direction of the fiber so as to enhance the bonding strength between the fiber bundles, avoid the cracking phenomenon between the bundles and finally realize the preparation of the large-size thin-wall C/C composite material component.
本发明公开了一种高导热薄壁单向碳/碳复合材料及其制备方法，通过展丝后的第一中间相沥青基碳纤维束制备无纬布；沿着无纬布纬向编织由第二中间相沥青基碳纤维束展丝成的纤维束，得到中间相沥青基碳纤维布；对中间相沥青基碳纤维布预沉积热解碳，得到预处理后的中间相沥青基碳纤维布；将预处理后的中间相沥青基碳纤维布进行铺层并沿厚度方向压紧，得到单向预制体；将单向预制体利用化学气相渗透工艺进行致密化，之后再进行石墨化热处理，石墨化热处理完成后得到高导热薄壁单向碳/碳复合材料。本发明旨在通过沿纤维径向编织纤维束对单向预制体进行结构优化，以增强纤维束间结合强度，避免束间开裂现象，最终实现大尺寸薄壁C/C复合材料构件的制备。
High-thermal-conductivity thin-wall unidirectional carbon/carbon composite material and preparation method thereof
一种高导热薄壁单向碳/碳复合材料及其制备方法
SONG QIANG (Autor:in) / ZHANG RUOQIAN (Autor:in) / SHEN QINGLIANG (Autor:in) / ZHOU ZHAOFAN (Autor:in) / ZHANG SHOUYANG (Autor:in) / LI WEI (Autor:in) / FU QIANGANG (Autor:in) / LI HEJUN (Autor:in)
27.08.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2024
| Europäisches Patentamt | 2024
| Europäisches Patentamt | 2024
Thermal conductivity of unidirectional carbon/carbon composites with different carbon matrixes
| British Library Online Contents | 2009
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