摘要
采用电弧熔炼的方法制备了Mn_(50-x)Co_xNi_(40)Sn_(10)(x=0,2,4,6)材料的合金铸锭.用X射线衍射表征样品的晶体结构,用MPMS-3磁性测量系统测量样品的相变和磁热效应.结果表明,Co替代Mn导致马氏体转变温度升高,这是由于Co原子的价电子数多于Mn原子导致的.所有样品在马氏体转变伴随着较大的磁化强度的突变,从而表现出较大的低场磁熵变.Mn_(50-x)Co_xNi_(40)Sn_(10)(x=0,2,4,6)以其较大的低场磁热效应、可调的工作温区在磁制冷领域有着潜在的应用.
The alloy ingots of Mn50-xCoxNi40Sn10(x=0, 2, 4, 6) were prepared by arc melting, and their crystal structure, phase transitions, and magnetocaloric effect were characterized by X-ray diffraction and MPMS-3 magnetic measurement system. The results show that the substitution of Co for Mn leads to the increase of martensite transformation temperature, which is due to the fact that the number of valence electrons in Co atom is more than that of Mn atom. The martensitic transformation of all samples is accompanied by a sudden change in magnetization, which results in large low-field magnetic entropy changes. Mn50-xCoxNi40Sn10(x=0,2,4,6) alloys have potential applications in the field of magnetic refrigeration thanks to the large low-field magnetocaloric effect and adjustable working temperature range.
作者
汪浩波
李尧
陈晓晴
陈琴皓云
韩志达
房勇
钱斌
江学范
WANG Haobo;LI Yao;CHEN Xiaoqing;CHEN Qinhaoyun;HAN Zhida;FANG Yong;Qian Bin;JIANG Xuefan(School of Physics and Electronic Engineering,Changshu Institute of Technology,Changshu 215500;College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123;Jiangsu Laboratory of Advanced Functional Materials,Changshu Institute of Technology,Changshu 215500,China)
出处
《常熟理工学院学报》
2019年第2期21-24,47,共5页
Journal of Changshu Institute of Technology
基金
国家自然科学基金项目"Ni-Mn基铁磁形状记忆合金的低温相分离和交换偏置效应研究"(51371004)
关键词
马氏体转变
磁热效应
铁磁形状记忆合金
磁熵变
martensitic transformation
magnetocaloric effect
ferromagnetic shape memory alloy
magnetic entropy change