Probing martensitic transformation,kinetics,elastic and magnetic properties of Ni2-xMn1.5In0.5Cox alloys  

作　　者：Xinzeng Liang Jing Bai Jianglong Gu Haile Yan Yudong Zhang Claude Esling Xiang Zhao Liang Zuo 

机构地区：[1]Key Laboratory for Anisotropy and Texture of Materials,Northeastern University,Shenyang,110819,China [2]School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao,066004,China [3]Hebei Provincial Laboratory for Dielectric and Electrolyte Functional Materials,Qinhuangdao,066004,China [4]State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao,066004,China [5]Laboratoire d’étude des Microstructures et de Mécanique des Matériaux,LEM3 CNRS,UMR 7239,University of Lorraine,57045,Metz,France

出　　处：《Journal of Materials Science & Technology》2020年第9期31-41,共11页材料科学技术（英文版）

基　　金：This work is supported by the National Natural Science Foundation of China(Grant Nos.51771044,51431005 and 51801020);the Natural Science Foundation of Hebei Province(No.E2019501061 and E2019203364);the Programme of Introducing Talents of Discipline Innovation to Universities 2.0(the 111 Project of China 2.0,No.BP0719037);the LiaoNing Revitalization Talents Program(Grant No.XLYC1802023).

摘　　要：The martensitic transformation,kinetics,elastic and magnetic properties of the Ni2-xMn1.5In0.5Cox(x=0-0.33)ferromagnetic shape memory alloys were investigated experimentally and theoretically by first-principles calculations.First-principles calculations show that Co directly occupies the site of Ni sublattice,and Co atoms prefer to distribute evenly in the structure.The optimized lattice constants are consistent with the experimental results.The martensitic transformation paths are as follows:PA↔FA↔6MFIM↔NMFIM when 0≤x<0.25;PA↔FA↔6MFM↔NMFIM with 0.25≤x<0.3 and PA↔FA↔NMFM with 0.3≤x≤0.33 for Ni2-xMn1.5In0.5Cox(x=0-0.33)alloys.The fundamental reasons for the decrease of TM with increasing Co content are explained from the aspects of first-principles calculations and martensitic transformation kinetics.The component interval of the magnetostructural coupling is determined as 0≤x≤0.25 by first-principles calculations.Furthermore,the origin of the demagnetization effect during martensitic transformation is attributed to the shortening of the nearest neighboring distances for Ni-Ni(Co)and Mn-Mn.Combining the theoretical calculations with experimental results,it is verified that the TM of the Co6 alloy is near room temperature and its magnetization differenceM is 94.6 emu/g.Therefore,magnetic materials with high performance can be obtained,which may be useful for new magnetic applications.

关 键 词：Ni-Mn-In-Co First-principles calculations Martensitic transformation KINETICS Elastic and magnetic property 

分 类 号：TG139.6[一般工业技术—材料科学与工程]