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OALib Journal期刊
ISSN: 2333-9721
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催化剂种类对C/C复合材料结构和性能的影响
Abstract:
以自制高成炭率氨酚醛树脂为基体炭源,采用溶剂分散铁、硼和铬催化剂、多次液相浸渍–炭化增密和石墨化处理的方法制备出密度为1.20～1.61g/cm3的碳/碳(C/C)复合材料。采用X射线衍射仪、扫描电子显微镜、四探针测试仪和弯曲强度测试等手段研究了催化剂种类对酚醛树脂基C/C复合材料结构和性能的影响。结果表明硼、铁和铬等催化剂的引入可显著提高C/C复合材料的整体石墨化程度,降低其电阻率,催化石墨化效果按Fe,B,Cr的顺序依次降低;密度对电阻率及其分布有重要影响,体积密度较高的C/C复合材料的电阻率分布较均匀。催化剂的引入使得C/C复合材料的弯曲强度有所下降,但表现出明显的韧性断裂特征。
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