C/C复合材料微波水热浸渍H_3PO_4改性研究  

Modification Research of C/C Composites with Microwave Hydrothermal Method by Impregnating in H_3PO_4 Solution

作　　者：弭群[1] 曹丽云[1] 黄剑锋[1] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,西安710021

出　　处：《航空材料学报》2010年第4期70-74,共5页Journal of Aeronautical Materials

基　　金：国家自然科学基金(50772063);教育部博士点基金(20070708001);教育部"新世纪优秀人才支持计划"基金(NBCT-06-0893);陕西省自然科学基金(SJ08-ZT05);陕西科技大学研究生创新基金资助

摘　　要：以磷酸为填充液与改性剂,采用微波水热法对碳/碳（C/C）复合材料进行了抗氧化改性。主要研究了微波水热反应温度、时间对改性C/C复合材料的结构及抗氧化性能的影响。研究结果表明：浸渍磷酸后材料抗氧化性能得到明显改善,微波水热改性是提高C/C复合材料抗氧化性能的一种有效途径;复合材料的抗氧化性能在120～210℃的水热改性范围内随着温度的升高而提高;经4h水热处理后材料的抗氧化性能达最佳;在210℃/4h微波水热处理后的C/C复合材料在700℃的空气气氛中氧化10h后的质量损失为9.47%,相对未改性的C/C复合材料抗氧化效果明显增加。Carbon/carbon（C/C） composite was modified by a novel microwave hydrothermal treatment method using phosphoric acid solution as filling solution and modifier.The influences of microwave hydrothermal treatment temperature and time on the microstructure and oxidation resistance of the as-modified C/C composites were particularly investigated.Results show that the anti-oxidation of the material modified in phosphoric acid improves obviously.Microwave hydrothermal treatment is an effective process to improve the oxidation resistance of the C/C composites.The anti-oxidation property of the composites improves with increasing hydrothermal treatment temperature at the temperature range of 120~210℃.The oxidation resistance of the material is best after four hours hydrothermal treatment.The mass loss of the modified C/C composites is 9.47% after oxidation at 700℃ in air for 10h,which is much lower than the non-modified C/C composites.

关 键 词：碳/碳复合材料 微波水热法 抗氧化 改性 

分 类 号：TB332[一般工业技术—材料科学与工程]