CNTs／Al2O3复合材料嵌入型显微结构的设计及影响因素分析

Design and influence factor analysis of CNTs'embedding microstructure model for CNTs/Al_2O_3 composites

为获得好的强韧化效果,提出了适合碳纳米管强韧化陶瓷基复合材料的嵌入型显微结构模型,应用杂凝聚法,分别采用单壁、多壁及定向碳纳米管复合,制备了具有该种结构特征的复合材料。对比研究了上述三种CNTs/Al2O3复合材料显微结构的差异及对复合材料性能的影响。结果表明,碳纳米管种类、形态及分散性对嵌入型显微结构的形成有影响,细且直的单壁碳纳米管有利于形成嵌入型显微结构。

To improve the reinforcing effect, a CNTs＇ embedding microstructure model for CNTs/Al2O3 composites was suggested. SWNTs/Al2O3, MWNTs/Al2O3 and aligned MWNTs/Al2O3 with this kind of microstructure were synthesized by heterocoagulation. Based on the microstructure and properties analysis, it has been found that the type, morphology and dispersibility of CNTs influence greatly the forming of CNTs＇ embedding microstructure model. The thin and straight SWNTs are advantageous to the forming of CNTs＇ embedding microstructure model.