Cellular microstructure modification and high temperature performance enhancement for Sm2Co17-based magnets with different Zr contents

作     者：Chao Wang Peng Shen Yikun Fang Shuai Wang Qiangfeng Li Lei Wang Wei Li Minggang Zhu Chao Wang;Peng Shen;Yikun Fang;Shuai Wang;Qiangfeng Li;Lei Wang;Wei Li;Minggang Zhu

作者机构：Division of Functional Materials ResearchCentral Iron and Steel Research InstituteBeijing 100081China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第120卷第25期

页      面：8-14页

核心收录：

学科分类：0710[理学-生物学] 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] 0702[理学-物理学] 

基　　金：partially supported by the National Natural Science Foundation of China (No. 51871063) the Key Technology Research and Development Program of Shandong (No. 2019JZZY020210) 

主　　题：Sm2Co17-type magnets Zr content High temperature magnetic properties FROC diagram 

摘      要：Influence of Zr contents on high-temperature magnetic performance of Sm(CoFeCuZr)(x=0.025,0.03,0.035,0.04) magnets were *** x increases from 0.025 to 0.04,the temperature coefficient of intrinsic coercivity(H) is optimized from-0.1673% K^(-1)to-0.1382% K^(-1)and the Hat 773 K gradually increases from 556.32 kA m^(-1)to 667 kA m^(-1).The microstructure and microchemistry of different Zr-content magnets were revealed by a transmission electron microscope equipped with *** increasing Zr content induces that the average size of cells decreases from ~76 nm to ~56 nm and the weight fraction of 1:5 H cell boundary phase increases from ~25% to ~37% as well,resulting decreasing of the average Cu content at cell boundaries from 13.59 at% to ~8.52 at%.It is found that the Cu-lean characteristic at cell boundary phase is the reason that gives rise to higher magnetic properties at elevated temperatures for x=0.04 magnet.