Effect of annealing temperature on magnetic properties of a sintered Nd-Fe-B magnet after grain boundary diffusion with Dy_(70)Cu_(30) alloy

作     者：Ruipeng Qian Yuxuan Ma Fugang Chen Hui Sun Yong Zhao Yunlong Chen Ruipeng Qian;Yuxuan Ma;Fugang Chen;Hui Sun;Yong Zhao;Yunlong Chen

作者机构：School of Materials Science and EngineeringJiangsu University of Science and TechnologyZhenjiang212003China School of Energy and Power EngineeringJiangsu University of Science and TechnologyZhenjiang212003China 

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

年 卷 期：2024年第42卷第1期

页      面：116-120,I0004页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：Project supported by the National Natural Science Foundation of China(51901087) Natural Science Foundation of Jiangsu Province(BK20190975,BK20201007) China Postdoctoral Science Foundation(2021M701504) Natural Science Foundation for Colleges and Universities in Jiangsu Province(20KJD470002) 

主　　题：Nd-Fe-B magnet Grain boundary diffusion Annealing Dy_(70)Cu_(30)alloy Rare earths 

摘      要：Grain boundary diffusion process(GBDP)has been developed as an effective approach to increase the coercivity of sintered Nd-Fe-B magnets by regulating the compositions and phase distributions near grain *** work aims to explore how to select the optimum annealing temperature after *** this work GBDP was performed on a sintered Nd-Fe-B magnet using Dy_(70)Cu_(30) *** GBDP the low eutectic temperature of the grain boundary phases decreases from the initial 492 to 451℃.The magnetic property dependent on different annealing temperatures near the low eutectic temperature was *** magnetic properties,especially the squareness factor of demagnetization curve show a strong dependence on the annealing *** GBDP the optimal magnetic properties can be obtained after annealing just above the low eutectic temperature of the grain boundary *** mechanism is discussed based on the microstructure analysis.