%0 Journal Article
%T Preparation of DyFe2 and TbFe2 by Reduction-Diffusion Process<br>Preparation of DyFe_2 and TbFe_2 by Reduction-Diffusion Process
%A Guangsi GUO
%A Guangtai WANG
%A Zhitong SUI
%A <br>Guangsi GUO
%A Guangtai WANG and Zhitong SUI
%J 材料科学技术学报
%D 2004
%I 
%X The pure intermetallic compounds (Tb1-xDyx)Fe2 are super-magnetostriction materials, which were produced from DyFe2and TbFe2 in this paper. The thermodynamic possibility and kinetic feasible conditions for DyFe2 and TbFe2 preparation by reduction-diffusion in Ca-Dy2O3-Fe and Ca-Tb4O7-Fe systems were analyzed and the products of DyFe2 and TbFe2 were confirmed by XRD. The contracting core model was applied to describe the reduction-diffusion process in which the diffusion is a rate-controlled step. The apparent activation energies of DyFe2 and TbFe2 processes are 45 and 39 k J/mol respectively.
%K Ca-Dy2O3 -Fe
%K Ca-Tb4O7-Fe
%K Reduction-diffusion
%K DyFe2
%K TbFe2
%K Contracting core model<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=0FC40FB6659EA5CCFC5D8E5B6764B4F5&yid=D0E58B75BFD8E51C&vid=A04140E723CB732E&iid=CA4FD0336C81A37A&sid=68D88C2FCF9C3098&eid=09ABD5535D9B6D45&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=12