Microstructure and mechanical property of multi-walled carbon nanotubes reinforced aluminum matrix composites fabricated by friction stir processing
Microstructure and mechanical property of multi-walled carbon nanotubes reinforced aluminum matrix composites fabricated by friction stir processing
复制标题
搅拌摩擦加工多壁碳纳米管增强铝基复合材料的微观结构与力学性能
DOI：
10.1016/j.matdes.2012.08.036
复制
发表时间：
2013-03-01
影响因子：
8.4
通讯作者：
Xing, Li
中科院分区：
文献类型：
--
作者：
Liu, Qiang;Ke, Liming;Xing, Li
采用搅拌摩擦工艺制备了不同含量多壁碳纳米管（MWCNTs）增强铝基复合材料。利用光学显微镜（OM）和透射电子显微镜（TEM）对复合材料的微观结构和铝基体与多壁碳纳米管之间的界面进行了研究。结果表明，多壁碳纳米管在整个FSP中很好地分散在铝基体中。拉伸试验和显微硬度测试表明，随着MWCNT含量的增加，MWCNTs/Al复合材料的拉伸强度和显微硬度逐渐增加，而伸长率则相反。当体积分数为6%时，最大拉伸强度达到190.2MPa加入MWCNTs后，该值是铝基体的2倍以上。失效试样的外观和断口形貌表明，随着MWCNT含量的增加，复合材料的脆性越来越大。(C)2012爱思唯尔有限公司保留所有权利。
Aluminum matrix composites reinforced by different contents of multi-walled carbon nanotubes (MWCNTs) were fabricated by friction stir processing (FSP). The microstructure of nano-composites and the interface between aluminum matrix and MWCNTs were examined using optical microscopy (OM) and transmission electron microscopy (TEM). It was indicated that MWCNTs were well dispersed in the aluminum matrix throughout the FSP. Tensile tests and microhardness measurement showed that, with the increase of MWCNT content, the tensile strength and microhardness of MWCNTs/Al composites gradually increased, but on the contrary, the elongation decreased. The maximum ultimate tensile strength reached up to 190.2 MPa when 6 vol.% MWCNTs were added, and this value was two times more of that of aluminum matrix. Appearances and fracture surface micrographs of failed composite samples indicated that the composites become more and more brittle with the increase of the MWCNT content. (C) 2012 Elsevier Ltd. All rights reserved.