Carbon-fiber-reinforced carbon composites fabricated with mesophase pitch
Carbon-fiber-reinforced carbon composites fabricated with mesophase pitch
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DOI：
10.1016/0008-6223(93)90010-8
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发表时间：
1993
期刊：
影响因子：
10.9
通讯作者：
K. Christ;K. J. Hüttinger
中科院分区：
文献类型：
--
作者：
K. Christ;K. J. Hüttinger
本研究以聚芳中间相为基体前驱体，制备碳纤维增强炭材料。在不同的压力和温度下，使用中间相含量为15 - 75体积%的沥青，对来自几个制造商并具有特定表面处理的碳纤维进行渗透。即使使用仅具有40体积%中间相的起始沥青，所得基质也显示出约80体积%的显著增加的中间相含量。只有在氧气中对绿色复合材料进行明确的稳定化处理后，复合材料才可能碳化而不溶胀。碳纤维复合材料的机械测试（1000°C）显示出四种失效行为模式，这取决于碳纤维的表面处理和基体的稳定化处理。在2100°C下石墨化处理后，发现弯曲强度高达650 MPa;由表面活化纤维和稳定基质制成的复合材料显示出最大的强度。
This study is concerned with the production of carbon-fiber-reinforced carbon with polyaromatic mesophase as matrix precursor. Carbon fibers from several manufacturers and with specific surface treatments were infiltrated at various pressures and temperatures using pitches with mesophase contents from 15 to 75 vol%. The resulting matrix shows a significantly increased mesophase content of about 80 vol% even if a starting pitch with only 40 vol% mesophase is used. Carbonization of composites without swelling was only possible after a well defined stabilization treatment of the green composites in oxygen. Mechanical testing of the carbonized composites (1000°C) showed four modes of failure behaviour, depending on the surface treatment of the carbon fibers and the stabilization treatment of the matrix. After a graphitization treatment at 2100°C, flexural strengths up to 650 MPa were found; a composite made of surface-activated fibers and a stabilized matrix displayed the greatest strength.