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. 2    April 2006

[PDF Download]    

    

Interface electron structure of Fe3Al/TiC composites
PANG Lai-xue(庞来学)1, SUN Kang-ning(孙康宁)1, 2, SUN Jia-tao(孙家涛)1,
FAN Run-hua(范润华)1, 2, REN Shuai(任 帅)1

1. Key Laboratory of Engineering Ceramic of Shandong Province, Ji’nan 250061,China
2. Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Ji’nan 250061, China

Abstract:Based on YU’s solids and molecules emperical electron theory(EET), interface valence electron structure of TiC-Fe3Al composites was set up, and the valence electron density of different atomic states TiC and Fe3Al composites in various planes was determined. The results indicate that the electron density of is consistent with that of (110)TiC in the first-class approximation, the absolute value of minimum electron density difference along the interface is 0.007 37 nm−2, and the relative value is 0.759%. preferred orientation is believed to benefit the formation of the cuboidal shape TiC. In the other hand, it shows that the particle growth is accompanied by the transport of electron, the deviation continuity of electron density intrinsically hinders the grain growth. The electron density of (100)TiC is not consistent with Fe3Al arbitrary crystallographic plane, thus it well explains that the increased titanium and carbon contents do not increase the size of large particles. The crystallographic orientation of will improve the mechanical properties. Therefore interface electron theory is an effective theoretical implement for designing excellent property of composites.

 

Key words: TiC/Fe3Al composite; intermetallic matrix composites; ceramic particles; YU’s theory; interface; electron density

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