%0 Journal Article
%T A DIFFUSION MODEL IN NANOCRYSTALLINE MATERIALS<br>纳米微晶材料的扩散机制
%A CHEN Da
%A <br>陈达
%J 金属学报
%D 1995
%I 
%X The activation energies,the preexponential factors and the corresponding self-diffusion coefficients for a nanocrystalline material in various diffusion conditions were calculated. Based on comparison of the calculated self-diffusions with the experimentally measured one, it is suggested that the diffusion model in nanocrystals is a complex one with the combination of the boundary diffusion by the vacancy mechanism and the internal surface diffusion of atoms along internal surfaces of boundary voids.
%K nanocrystalline materials
%K diffusion
%K computer modeling<br>纳米材料
%K 扩散
%K 计算机模拟
%K 激活能
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=2BC1BACB66FE395B5E01C054969D6C38&yid=BBCD5003575B2B5F&vid=4AD960B5AD2D111A&iid=5D311CA918CA9A03&sid=9D9F10A828991FA6&eid=3622B70F9C54A9CC&journal_id=0412-1961&journal_name=金属学报&referenced_num=3&reference_num=1