Effect of yttrium substitution on magnetic properties and service performances of Nd-Fe-B sintered magnets

作     者：Xiaodong Fan Shuai Guo Guangfei Ding Sining Fan Zhehuan Jin Renjie Chen Shukai Zhang Aru Yan Xiaodong Fan;Shuai Guo;Guangfei Ding;Sining Fan;Zhehuan Jin;Renjie Chen;Shukai Zhang;Aru Yan

作者机构：CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo 315201China Chinalco Shandong Yinuowei Strong Magnetic Material Co.LtdTaian 271600China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2023年第41卷第1期

页      面：116-121页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Project supported by the Key Research and Development Program of Shandong Province (2019JZZY010321) the Major Project of "Science and Technology Innovation 2025" in Ningbo City (2020Z050) Ningbo Natural Science Foundation (202003N4352) the Kunpeng Project in Zhejiang Province and National Natural Science Foundation of China (52101238) 

主　　题：Y substitution Magnetic properties Service performances Nd-Fe-B sintered Magnets Rare earths 

摘      要：We successfully fabricated partial Y substituted NdY-Fe-B magnets with nominal compositions of(Nd_(1-x)Y_(x))_(13.80)Fe_(ba1)Al_(0.24)Cu_(0.1)B_(6.04)(at%,x=0,0.1,0.2,0.3,0.4) by powder metallurgy process and the magnetic properties as well as service performances of the magnets were also systematically *** phase constituents of the magnets have no obvious variation within the whole range of Y content,while the main phase grains form in-situ core-shell structure where Y gathers in the core and Nd mainly distributes in the *** with pure Nd-Fe-B magnets,the magnetic performances of Y substituted magnets slightly decrease on account of the poor intrinsic magnetic properties of Y_(2)Fe_(14)***,the μ_(O)M_(r),μ_(O)H_(cj) and(BH)_(max) of the 20 at% Y magnet still remain at a high level of 1.325 kG,1.173 kOe and 342.884 kj/m^(3),which approaches the performances of commercial N45-grade *** service performances of Y substituted magnets indicate that though the surface corrosion products and Vickers hardness of the NdY-Fe-B magnets increase to a certain extent compared to Nd-Fe-B,the magnets with Y substitution still display relatively good service ***,on the basis of sacrificing little partial magnetic and service performances,Y substituted Nd can still prepare NdY-Fe-B medium-grade *** this way,we achieve the balanced utilization of rare earth resources,which has significant meanings for the industry and scientific research.