碳纳米管增强铝基复合材料的制备及其力学性能表征  

Preparation and Mechanical Properties of Carbon Nanotubes Reinforced Aluminium Composite

作　　者：姚辉[1,2] 靳瑜[1,2] 陈名海[2] 吴昊[1,2] 刘宁[1] 李清文[2] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009 [2]中国科学院苏州纳米技术与纳米仿生研究所,苏州215123

出　　处：《材料导报》2012年第18期111-115,共5页Materials Reports

基　　金：中国科学院院地合作项目;中国科学院战略先导项目;苏州市科技项目(SWG0905)

摘　　要：利用高速剪切和球磨相结合的工艺,用石蜡辅助分散,制备得到碳纳米管(CNT)/铝复合粉体,随后采用常压烧结与大气热压相结合的工艺成型,最后经过热挤二次加工制备得到CNT增强铝基复合材料。结果表明,采用石蜡辅助的球磨混合分散工艺能显著改善CNT在基体中分布的均匀性,常压烧结后大气热压能显著提高材料致密度,达到类似热压烧结的效果,使材料力学性能显著提高;随着CNT含量的增加,复合材料的拉伸强度和布氏硬度逐渐升高,当CNT质量分数增加到2.0%时达到最大值,分别为245MPa和106.66N/mm2。Carbon nanotubes （CNT） aluminium composite powders were prepared by high-speed shearing dis- persion and ball milling with the assistance of paraffin wax dispersion. Then, the composite was fabricated by a com- bined process of pressureless sintering and atmosphere hot-pressing sintering followed by hot-extrusion as secondary processing. The results show that the paraffin wax assistant ball milling process can improve the dispersion of CNT in aluminium matrix, and the combination of pressureless sintering and atmosphere hot-pressing can effectively increase the density of the compacts, comparing to the generally used hot-press sinteringprocess. Therefore, the mechanical properties of the composite material can be obviously improved. As the increase of mass fraction of carbon nanotubes, the tensile strength and Brinell hardness of the composite are elevated, and achieve the maximum of 245MPa and 106.66N/mm^2 , respectively, when the mass fraction of carbon nanotubes increases ta 2.0wt%

关 键 词：碳纳米管 铝基复合材料 力学性能 

分 类 号：TB333[一般工业技术—材料科学与工程]