Abstract

The porous structure of a four-dimensional carbon rod frame based on carbon fibers, assembled according to the 4D-L scheme and used to produce a carbon–carbon composite material, is investigated. The sizes of the inter-rod and intrarod pores of various types are determined or estimated. Some specific features of sequential repeated impregnations with coal tar pitch and subsequent carbonization, first of the carbon frame, and then of the composite blanks obtained as a result of compaction, both at atmospheric and high pressures, are studied. It is shown that in the absence of external pressure, capillary forces can ensure the filling of only the intrarod pores, while to fill the inter-rod pores, it is necessary to use a high pressure of up to 10 MPa with a sufficient duration of its application.

中文翻译：

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碳-碳复合材料制造中四维骨架浸渍的特点

摘要

研究了基于碳纤维的四维碳棒框架的多孔结构，根据 4D -L方案组装并用于生产碳-碳复合材料。确定或估计各种类型的杆间和杆内孔的尺寸。研究了煤焦油沥青连续重复浸渍和随后碳化的一些具体特征，首先是碳框架，然后是在大气压和高压下压实获得的复合材料坯料。结果表明，在没有外压的情况下，毛细作用力只能保证填充棒内孔隙，而填充棒间孔隙则需要使用高达 10 MPa 的高压和足够的持续时间。其应用。