摘要
本文系统研究了熔体快淬速率和Ti含量对Sm_(0.8)Zr_(0.2)(Fe_(0.8)Co_(0.2))12-xTi_(x)(x=0.50,0.75,1.00,1.25)合金磁性能、相组成、显微结构及磁化行为的影响。研究发现,合适的Ti含量和熔体快淬速率有利于磁体磁性能的优化,熔体快淬速率为30 m·s^(-1)的Sm_(0.8)Zr_(0.2)(Fe_(0.8)Co2)11Ti合金表现出较好的磁性能。X射线衍射图谱显示,Ti有助于合金中形成ThMn_(12)型SmFe_(12)相。然而,合适的Ti含量和熔体快淬速率均无法抑制析出α-(Fe,Co)相。熔体快淬速率为30 m·s^(-1)的Sm_(0.8)Zr_(0.2)(Fe_(0.8)Co_(0.2))12-xTi_(x)合金的Henkel曲线显示,x=1.00时合金表现出最强的交换耦合作用。TEM结果表明x=1.00时合金的晶粒尺寸更加细小且尺寸分布更加均匀,是其交换耦合作用较强的主要原因,进而优化合金剩磁比和最大磁能积。此外,针对ThMn_(12)型相的元素含量分析证明过量的Ti含量会导致ThMn_(12)型相中的Ti含量增加而Co含量下降,从而导致ThMn_(12)型相磁晶各向异性下降,使合金内禀矫顽力下降。
This paper systematically studied the effects of melt spinning rate and Ti content on the magnetic properties,phase composition,microstructure,and magnetization behavior of Sm_(0.8)Zr_(0.2)(Fe_(0.8)Co_(0.2))_(12)-xTi_(x)(x=0.50,0.75,1.00,1.25).It is found that the suitable Ti content and melt spinning rate are favorable for the optimization of the magnetic properties of the magnet,and the Sm_(0.8)Zr_(0.2)(Fe_(0.8)Co_(0.2))11Ti alloy with a melt spinning rate of 30 m·s^(-1)shows better magnetic properties.The X-ray diffractions show that Ti contributes to the formation of the ThMn_(12)-type SmFe_(12)phase in the alloy.However,neither the appropriate Ti content nor the melt spinning rate can inhibit theα-(Fe,Co)phase in the alloy.The Henkel curves of Sm_(0.8)Zr_(0.2)(Fe_(0.8)Co_(0.2))_(12)-xTi_(x)alloy with a melt spinning rate of 30 m·s^(-1)show that the alloy exhibits the strongest strength of exchange coupling at x=1.00,while the TEM results indicate that the alloy has a finer grain size and a more uniform size distribution at x=1.00,which is the main reason for the strong exchange coupling.The TEM results show that the finer grain size and more uniform size distribution of the alloy at x=1.00 are the main reasons for the enhanced exchange coupling,which in turn optimizes the remanent magnetization ratio and the maximum energy product of the alloy.In addition,the analysis of the elemental content of the ThMn_(12)phase proves that excessive Ti content leads to the increase of Ti content and the decrease of Co content in the ThMn_(12)phase,which results in the decrease of the magnetocrystalline anisotropy of the ThMn_(12)phase,leading to the decrease of the intrinsic coercivity of the alloy.
作者
邢梓操
刘冰玉
俞能君
李迎畅
杨杭福
吴琼
葛洪良
Xing Zicao;Liu Bingyu;Yu Nengjun;Li Yingchang;Yang Hangfu;Wu Qiong;Ge Hongliang(College of Materials and Chemistry,China Jiliang University,Hangzhou 310018,China;Mianyang Liangda Technology Innovation Service Co.,Ltd.,Mianyang 621050,China)
出处
《中国稀土学报》
北大核心
2025年第3期541-548,共8页
Journal of the Chinese Society of Rare Earths
基金
国家重点研发计划青年科学家项目(2021YFB3501600,2022YFB3504800)
国家自然科学基金面上项目(52371201)
中国科协青年人才托举工程项目(2022QNRC001)
浙江省重点研发计划项目(2024C01189,2021C01191,2021C01190,2023C01077)资助。
作者简介
邢梓操(1997-),男,学士;通讯联系人:俞能君,男,副研究员,研究方向:稀土永磁材料。E-mail:nengjunyu@cjlu.edu.cn。
