Microstructure and microwave absorption properties of MWCNTs reinforced magnesium matrix composites fabriccated by FSP  

作　　者：CHEN Yu-hua MAO Yu-qing XIE Ji-lin ZHAN Zi-lin YU Liang 陈玉华;毛育青;谢吉林;占字林;余亮(School of Aerospace Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China)

机构地区：School of Aerospace Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China

出　　处：《Optoelectronics Letters》2017年第1期1-4,共4页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51265042)

摘　　要：Multiwall carbon nanotubes(MWCNTs) reinforced magnesium matrix(MWCNTs/Mg) composites were successfully fabricated by friction stir processing(FSP). Microstructure and microwave-absorption properties of WCNTs/Mg composites are studied. The results show that with increasing the MWCNTs content to 7.1% in volume fraction,the agglomeration of MWCNTs is found in the WCNTs/Mg composites. The addition of MWCNTs has little effect on microwave-absorption properties. With increasing the frequency from 2 GHz to 18 GHz,the microwave absorption of the composites decreases. Compared with the absorption loss of the MWCNTs,the reflection loss of base material takes the most part of the loss of the microwave,and the increase of the reflection loss can promote electromagnetic shielding properties of the composites. Moreover,the electromagnetic shielding properties of the composites are less than-85 d B in the lower frequency range from 0.1 MHz to 3 GHz. With increasing the content of MWCNTs,the electrical conductivity of the composites is decreased,and the electromagnetic shielding properties is slightly enhanced.

关 键 词：microwave magnesium shielding agglomeration nanotubes reinforced slightly diameters attractive friction 

分 类 号：TB333[一般工业技术—材料科学与工程]