Ni-Mn-Sn-Co多孔纤维合金的制备及磁性能探讨  

Preparation and magnetic properties of Ni-Mn-Sn-Co porous microwires

作　　者：蔡欣男 张鹤鹤 李凤 谭甜甜 郭春江 万杰 CAI Xinnan;ZHANG Hehe;LI Feng;TAN Tiantian;GUO Chunjiang;WAN Jie(Chong Qing Materials Research Institute Co.,Ltd.,Chongqing 400707,China;School of Metallurgy and Materials Engineering,Chongqing University of Science and Technology,Chongqing 401331,China)

机构地区：[1]重庆材料研究院有限公司,重庆400707 [2]重庆科技学院冶金与材料工程学院,重庆401331

出　　处：《物理测试》2023年第4期5-10,共6页Physics Examination and Testing

基　　金：国家自然科学基金项目(52101212);重庆市自然科学基金面上项目(cstc2020jcyj-msxmX0564);重庆市教委科技研究计划项目(KJQN202001505)。

摘　　要：Ni-Mn-Sn哈斯勒合金作为具有开发潜能的磁制冷材料被广泛研究,而纤维或泡沫态Ni-Mn-Sn合金可提高磁制冷材料的制冷效率。试验选用铁磁性元素Co取代Ni-Mn-Sn合金中的少量Ni,提高合金的磁化强度,采用熔体抽拉法制备Ni-Mn-Sn-Co多晶纤维,采用腐蚀法制备Ni-Mn-Sn-Co多孔纤维。利用扫描电子显微镜(SEM)、差示扫描量热仪(DSC)和综合物性测量系统(PPMS)中的振动样品磁强计(VSM)对Ni-Mn-Sn-Co纤维形貌及性能进行了表征。结果表明,相比于淬火态纤维,Ni-Mn-Sn-Co多孔纤维的滞后损失明显降低,相变温度随磁场的偏移量略有增加,有利于磁制冷效率的提高。Ni-Mn-Sn Heusler alloy has been widely studied as a potential magnetic refrigeration material.Ni-Mn-Sn alloy in the form of fiber or foam can improve the magnetic refrigeration efficiency.The ferromagnetic element Co was employed to replace a small amount of Ni in Ni-Mn-Sn alloy to enhance the magnetization intensity of the alloy.Ni-Mn-Sn-Co polycrystalline fibers were prepared by melt-extraction technique,and Ni-Mn Sn-Co porous fibers were prepared by corrosion method.The morphologies and properties of the Ni-Mn-Sn-Co fibers were characterized by means of scanning electron microscopy(SEM),differential scanning calorimeter(DSC)and vibrating sample magnetometry(VSM)in a commercial physical property measurement system(PPMS).The results showed that the hysteresis loss of Ni-Mn-Sn-Co porous fibers was significantly reduced compared to the quenched fibers.The phase transition temperature slightly increased with the magnetic field shift,which was conducive to the improvement of the magnetic refrigeration efficiency.

关 键 词：铁磁形状记忆合金 多孔纤维 马氏体相变 磁性能 

分 类 号：TB64[一般工业技术—制冷工程] TG132[一般工业技术—材料科学与工程]