| 催化剂在浸渍增密C/C复合材料中的作用 |
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| 引用本文： | 宋发举,李铁虎,王大为,周振中.催化剂在浸渍增密C/C复合材料中的作用[J].机械科学与技术(西安),2006,25(4):442-444. |
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| 作者姓名： | 宋发举 李铁虎 王大为 周振中 |
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| 作者单位： | 西北工业大学 材料学院,西安710072 |
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| 摘 要： | 在用煤沥青浸渍增密C/C复合材料时,如何提高煤沥青的残炭率,减少制造过程中闭气孔的形成,是降低复合材料制造成本的关键。本文采用在浸渍增密前,将预制体炭纤维浸泡在硝酸镍溶液中,然后烘干、浸渍的方法增密C/C复合材料。结果表明:由于在沥青炭化过程中,硝酸镍分解产生的N i具有催化作用,从而可使浸渍增密效果提高,制造过程中形成的闭气孔减少。在经过6次浸渍/炭化处理后,C/C复合材料的密度可达到1.70 g/cm3以上。
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| 关 键 词： | C/C复合材料 煤沥青 残炭率 浸渍 催化 |
| 文章编号： | 1003-8728（2006）04-0442-03 |
| 收稿时间： | 2005-09-06 |
| 修稿时间： | 2005-09-06 |
The Role of a Catalyst in Densification of C/C Composites by Impregnation |
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| Song Faju,Li Tiehu,Wang Dawei,Zhou Zhenzhong.The Role of a Catalyst in Densification of C/C Composites by Impregnation[J].Mechanical Science and Technology,2006,25(4):442-444. |
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| Authors: | Song Faju Li Tiehu Wang Dawei Zhou Zhenzhong |
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| Abstract: | Improving carbon yield and cutting down closed pores are key to reducing manufacture costs of C/C composites in case of melted coal tar pitch impregnation.In this paper,prefabricated coal fiber was dipped in Ni(NO_(3))_(2) solution and then dried before impregnation.The result shows that the impregnation effect is improved due to the catalysis of nickel decomposed from Ni(NO_(3))_(2) and that closed pores are reduced.The density of C/C composites can exceed 1.70 g/cm~(3)after impregnation/carbonation for six times. |
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| Keywords: | carbon/carbon composites coal tar pitch carbon yield impregnation catalysis |
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