Structural investigations of a boron carbide nanorod with pseudo-fivefold twinned cross-section  

作　　者：YU ZhiYang FU Xin ZHU Jing 

机构地区：[1]Beijing National Center for Electron Microscope Laboratory, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

出　　处：《Science China(Technological Sciences)》2011年第8期2119-2122,共4页中国科学（技术科学英文版）

基　　金：supported by the National Basic Research Program of China ("973" Project) (Grant No. 2009CB623701);the National Nature Science Foundation of China (Grant No. 50831160521)

摘　　要：In this article, a detailed investigation of the cross-section structure of a fivefold twinned boron carbide nanorod is presented. TEM observations reveal that the nanorod possesses a remarkable pseudo-fivefold twinned cross-section which consists of eight subcrystals packing around its fivefold axis. It is proposed that the negative angular mismatch of 5° for the unrelaxed boron carbide nanowires, which arises from the imperfectness of filling five twinned segments into a 360° solid space, is to be accommodated in one single subunit. The nanorod is found to be free from damage during sample preparation and it retains the intrinsic structural distortions of boron carbide nanowires.

关 键 词：boron carbide fivefold twinned angular misfit CHARACTERIZATION 

分 类 号：TU112.4[建筑科学—建筑理论] TQ174.758[化学工程—陶瓷工业]