Relationship between microstructure and magnetic domain structure of Nd-Fe-B melt-spun ribbon magnets

作     者：Masaaki TAKEZAWA Hiroyuki TANEDA Yuji MORIMOTO 

作者机构：Department of Applied Science for Integrated System Engineering Faculty of Engineering Kyushu Institute of Technology 1-1 Sensui-cho Tobata-ku Kitakyushu Fukuoka 804-8550 Japan 

出 版 物：《Frontiers of Materials Science》 (材料学前沿（英文版）)

年 卷 期：2015年第9卷第2期

页      面：206-210页

核心收录：

学科分类：07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 070205[理学-凝聚态物理] 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：Japan Society for the Promotion of Science  JSPS: 26420311 

主　　题：magnetic domain microstructure Kerr effect microscope magneto-optical effect Nd-Fe-B permanent magnet 

摘      要：The relation between the microstructure, observed using an electron probe microanalyzer, and the domain structure, observed using a Kerr microscope, was established to evaluate the effects of hot rolling and the addition of Ti-C on the c-axis orientation and the magnetization process of hot-rolled Nd-Fe-B-Ti-C melt-spun ribbons. The addition of Ti-C promotes the c-axis orientation and high coercivity in the ribbons. Elemental mapping suggests a uniform elemental distribution; however, an uneven distribution of Ti was observed in an enlarged grain with Ti-enriched points inside the grain. The reversal domains that nucleated at the Ti-enriched point inside the grain cause low coercivity.