NdFe12永磁化合物中的相转变研究  

Phase Transformation in NdFe12 Permanent Magnet Materials

作　　者：王坤宇 冯运莉 柳昆 Wang Kunyu;Feng Yunli;Liu Kun(North China University of Science and Technology,Tangshan 063120,China)

机构地区：[1]华北理工大学,河北唐山063120

出　　处：《稀有金属材料与工程》2020年第8期2754-2759,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51674123);河北省自然科学基金(E2017209237)。

摘　　要：制备了NdFe12铸锭并使用EDS能谱分析了冷却过程中铸锭中的相变过程,同时使用熔体快淬法制备了NdFe12薄带,通过X射线衍射分析了薄带中相的组成。研究发现在Nd(FeTiNb)12铸锭凝固过程中,冷却速度大时容易形成亚稳相1:12相与3:29相,而冷却速度低时容易形成稳定相2:17相与5:17相。较高的冷却速度是得到1:12亚稳相的关键。控制NdFe12系化合物中相组成及相变过程对之后稀土永磁材料的制备具有很重要的意义。NdFe12 ingots were prepared and EDS spectra were used to analyze the phase transformation process in the ingot during cooling.A NdFe12 ribbon was prepared by melt quenching method and the composition of the phase in the ribbon was analyzed by X-ray diffraction.The results show that during the solidification of Nd(FeTiNb)12 ingots,metastable phases of 1:12 and 3:29 are likely to be formed when the cooling rate is high,and stable phases of 2:17 and 5:17 are easily formed when the cooling rate is low.A higher cooling rate is the key to obtain a 1:12 metastable phase.Controlling the phase composition and phase transformation process of NdFe12 compounds is of great significance for the preparation of rare earth permanent magnet materials.

关 键 词：NdFe12 永磁材料 相转变 

分 类 号：TM273[一般工业技术—材料科学与工程]