%0 Journal Article
%T Ab initio study of the martensitic transformation of NiTi shape memory alloys<br>NiTi形状记忆合金马氏体相变的第一性原理研究
%A Gong Chang-Wei
%A Wang Yi-Nong
%A Yang Da-Zhi
%A <br>宫长伟
%A 王轶农
%A 杨大智
%J 物理学报
%D 2006
%I 
%X In order to systematically understand the mechanism of martensitic transformation of NiTi shape-memory alloy, and to study the effect of temperature and stress on the electronic structure, we have carried out first-principles calculations based on the density-functional theory (DFT). Analysis of density of states shows that martensitic transformation induces the Fermi face to shift and the density of states near the Fermi face to decrease. With the temperature decreasing and deformation increasing,the density of state of B2 phase and the degree of energy band overlaps increase,thus the stability decrease.
%K NiTi<br>电子结构
%K 第一性原理计算
%K 相变
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=18763E582562C83A&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=B31275AF3241DB2D&sid=8423D3852F5C1E02&eid=74D3A5A7A96E9D84&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=21