您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 16    No. 1    February 2006

[PDF Download]    

    

Growth mechanism of Cu nanopowders prepared by anodic arc plasma
WEI Zhi-qiang(魏智强)1, 2, XIA Tian-dong(夏天东)2, MA Jun (马 军)1, DAI Jian-feng(戴剑锋)1,FENG Wang-jun(冯旺军)1, WANG Qing (王 青)1, YAN Peng-xun(闫鹏勋)3

1. School of Science, Lanzhou University of Technology, Lanzhou 730050, China;
2. College of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
3. Research Institute of Plasma and Metal Materials, Lanzhou University, Lanzhou 730000, China
Received 26 April 2005; accepted 15 August 2005

Abstract:Based on the thermodynamics and kinetics theory, a theoretical model was built to illuminate the formation of metal nanopowders by anodic arc discharging plasma method, and the mechanism of particle nucleation and growth was investigated. In addition, the morphology, crystal structure, particle size and specific surface area of the nanopowders were characterized by X-ray diffraction(XRD), Brunauer-Emmett-Teller(BET) adsorption, transmission electron microscopy(TEM) and the corresponding selected area electron diffraction(SAED). The experimental results indicate that the nanopowders prepared by this process have uniform size, high purity, single phase and spherical shape. The crystal structure is FCC structure, the same as that of the bulk materials; the specific surface area is 12 m2/g, the particle size distribution ranges from 30 to 90 nm with an average particle size of 67 nm which is obtained from TEM and confirmed from XRD and BET results.

 

Key words: anodic arc plasma; Cu nanopowders; nucleation; grain growth

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn