碳纳米管陶瓷基复合材课程论文.docxVIP

研究生课程考核试卷（适用于课程论文、提交报告）科 目： 纳米材料与技术 教 师：姓 名： 学 号：专 业： 类 别： 学术上课时间： 年 9 月至 年 12 月 考 生 成 绩：卷面成绩平时成绩课程综合成绩阅卷评语：阅卷教师 (签名)xx大学研究生院碳纳米管陶瓷基复合材料学 生：学 号：专 业：xx大学材料科学与工程学院摘 要碳纳米管作为一种新型炭材料，由一层或者多层石墨片按照一定螺旋角卷曲而成六边形无缝结构，具有独特的纳米结构和优异的力学、电学、热学和物理化学性能，在各个领域显示出诱人的潜在应用价值和前景，引起了科学界广泛的研究。碳纳米管因其独特的结构而具有许多独特的性能，除了在半导体器件、储氢、传感器、吸附材料、电池电极、催化剂载体等领域具有非常广阔和诱人的应用前景外, 碳纳米管在制备结构、功能以及结构/功能一体化复合材料方面也将大有作为。本文对国内外碳纳米管增强陶瓷基复合材料的研究状况进行了综合分析，指出了存在的问题及以后的发展方向。重点介绍采用多壁碳纳米管作为增韧材料，用杂凝聚的方法制备碳纳米管-氧化铝复合粉末，通过热压烧结的方法得到了碳纳米管-氧化铝复合材料。复合材料的断裂韧度是相同条件下所得纯氧化铝陶瓷的2 .1倍，而强度基本上没有变化。关键词：碳纳米管；碳纳米管—氧化铝复合材料；制备方法；应用AbstractAbstract: Carbon nanotubesare acompletelynew typeof carbon material family withunique tubular structures of nanometerscale which can be described as aseamless cylinder of rolled up hexagonal networks and helical fashionof graphite sheets. In recent years,carbonnanotubeshavebecomethe focusofconsiderablestudybecauseoftheiruniquestrengthalong without-standingmechanical, electrical, thermalandphysicochemicalproperties,showing attractiveapplicationvaluesandprospectinvarious fields.Carbon nanotubes (CNTs) have manyParticular properties due to its particular structures.As a result, CNTs show application advantages not only in the fields of adsorption, hydrogen storage,catalyst support , cellelectrode, sensor, semiconductor apparatus,and so on, but also in the fabrication of ceramic matrix composites with integral structural and functional properties. The research anddevelopment of CNTs reinforced ceramic matrix composites at home and abroad were reviewed, andthe existing problems and the future research direction also w ere pointed out.It laid emphasis on that MWNTs-Al2O3 ceramic composite are obtained by hot pressed sintering with MWNTs as toughening agent, on the heterocoagulation method of dispersing MWNTs inAl2O3. The fracture toughness has increased1.8 times in comparison with pure alumina prepared in the same conditions, and the flexure strengthvaries slightly.Ke