Carbon-carbon composite material crucible and preparation method thereof: Fid-Bau Portal

Carbon-carbon composite material crucible and preparation method thereof

HUANG SHUIXIA / ZENG GUOWEI / ZHU HAIXIANG / SHENG LONGZHOU / PANG ZHAO / CHAI YUJIAN

The invention discloses a carbon-carbon composite material crucible and a preparation method thereof, belongs to the technical field of carbon-carbon composite material crucibles, and particularly relates to a method for cutting a carbon fiber precursor into short carbon fiber shreds and pretreating the short carbon fiber shreds to obtain pretreated short carbon fiber shreds; in the pretreatment, the carbon fiber short shreds are treated by using an acid treatment solution; adding the pretreated short carbon fiber shreds into a modification solution, and carrying out modification treatment to obtain modified short carbon fiber shreds; the modified solution contains amyl alcohol and propyl lactate; preparing a carbon fiber web from the modified carbon fiber short shreds, and preparing the unidirectional cloth from the carbon fiber web and the carbon fiber precursor; the carbon fiber net tire, the one-way cloth and the two-way cloth are arranged on a model to prepare a crucible prefabricated body; and performing normal-pressure impregnation carbonization and vapor deposition densification on the crucible preform to obtain the carbon-carbon composite material crucible. The prepared carbon-carbon composite material crucible is good in thermal conductivity and small in thermal expansion coefficient.

本发明公开了一种碳碳复合材料坩埚及其制备方法，属于碳碳复合材料坩埚技术领域，具体涉及将碳纤维原丝切割成碳纤维短切丝，并经预处理制备得到预处理碳纤维短切丝；预处理中使用酸处理液对碳纤维短切丝处理；将预处理碳纤维短切丝加入改性溶液中进行改性处理得到的改性碳纤维短切丝；改性溶液中含有戊醇和乳酸丙酯；将改性碳纤维短切丝制成碳纤维网胎，再由碳纤维网胎与碳纤维原丝制备得到单向布；将碳纤维网胎、单向布及双向布于模型上制备得到坩埚预制体；坩埚预制体经常压浸胶碳化及气相沉积增密得到碳碳复合材料坩埚。本发明制备得到的碳碳复合材料坩埚的导热性好，热膨胀系数小。

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