Xiao-Dong Fan, Yu-Hao Li, Shuai Cao, Guang-Fei Ding, Shuai Guo, Bo Zheng, Ren-Jie Chen, A. Ru Yan
{"title":"通过层状结构设计提高(钕、钇)-铁-B 烧结磁体的矫顽力和热稳定性","authors":"Xiao-Dong Fan, Yu-Hao Li, Shuai Cao, Guang-Fei Ding, Shuai Guo, Bo Zheng, Ren-Jie Chen, A. Ru Yan","doi":"10.1007/s12598-024-02888-2","DOIUrl":null,"url":null,"abstract":"<p>The incorporation of the high-abundance rare-earth element Y in (Nd,Y)–Fe–B sintered magnets offers an opportunity to reduce the cost of permanent magnetic materials, while promoting the balanced usage of rare-earth resources. However, the performance of (Nd,Y)–Fe–B magnets prepared using the conventional dual-main-phase (DMP) method undergoes significant degradation due to the strong diffusion ability of Y. To suppress the excessive diffusion of Y, this study presents a macroscopic lamellar magnet preparation scheme. Consequently, the micromagnetic simulations revealed that the multilayer magnets exhibited superior intrinsic performance compared to DMP magnets. Subsequently, the multilayer magnets were prepared by alternately stacking the 0% Y (0Y) and 30% Y (30Y) magnetic powders. The observed magnetic properties demonstrated that the coercivity of the three-layer magnet was ~ 0.23 T higher than that of the DMP magnet, leading to improved coercivity stability at high temperatures. Furthermore, the microstructural observations and elemental analyses indicated the presence of a ~ 200-μm-thick interface layer at the contact site between the 0Y and 30Y magnetic layers. Thus, the proposed approach effectively suppressed the excessive diffusion of Y in (Nd,Y)–Fe–B magnets, thereby enhancing the magnetic performance of the sintered magnets.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\n","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":null,"pages":null},"PeriodicalIF":9.6000,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhancing coercivity and thermal stability of (Nd,Y)–Fe–B sintered magnets through lamellar structure design\",\"authors\":\"Xiao-Dong Fan, Yu-Hao Li, Shuai Cao, Guang-Fei Ding, Shuai Guo, Bo Zheng, Ren-Jie Chen, A. Ru Yan\",\"doi\":\"10.1007/s12598-024-02888-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The incorporation of the high-abundance rare-earth element Y in (Nd,Y)–Fe–B sintered magnets offers an opportunity to reduce the cost of permanent magnetic materials, while promoting the balanced usage of rare-earth resources. However, the performance of (Nd,Y)–Fe–B magnets prepared using the conventional dual-main-phase (DMP) method undergoes significant degradation due to the strong diffusion ability of Y. To suppress the excessive diffusion of Y, this study presents a macroscopic lamellar magnet preparation scheme. Consequently, the micromagnetic simulations revealed that the multilayer magnets exhibited superior intrinsic performance compared to DMP magnets. Subsequently, the multilayer magnets were prepared by alternately stacking the 0% Y (0Y) and 30% Y (30Y) magnetic powders. The observed magnetic properties demonstrated that the coercivity of the three-layer magnet was ~ 0.23 T higher than that of the DMP magnet, leading to improved coercivity stability at high temperatures. Furthermore, the microstructural observations and elemental analyses indicated the presence of a ~ 200-μm-thick interface layer at the contact site between the 0Y and 30Y magnetic layers. Thus, the proposed approach effectively suppressed the excessive diffusion of Y in (Nd,Y)–Fe–B magnets, thereby enhancing the magnetic performance of the sintered magnets.</p><h3 data-test=\\\"abstract-sub-heading\\\">Graphical Abstract</h3>\\n\",\"PeriodicalId\":749,\"journal\":{\"name\":\"Rare Metals\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":9.6000,\"publicationDate\":\"2024-07-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Rare Metals\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1007/s12598-024-02888-2\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Rare Metals","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s12598-024-02888-2","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Enhancing coercivity and thermal stability of (Nd,Y)–Fe–B sintered magnets through lamellar structure design
The incorporation of the high-abundance rare-earth element Y in (Nd,Y)–Fe–B sintered magnets offers an opportunity to reduce the cost of permanent magnetic materials, while promoting the balanced usage of rare-earth resources. However, the performance of (Nd,Y)–Fe–B magnets prepared using the conventional dual-main-phase (DMP) method undergoes significant degradation due to the strong diffusion ability of Y. To suppress the excessive diffusion of Y, this study presents a macroscopic lamellar magnet preparation scheme. Consequently, the micromagnetic simulations revealed that the multilayer magnets exhibited superior intrinsic performance compared to DMP magnets. Subsequently, the multilayer magnets were prepared by alternately stacking the 0% Y (0Y) and 30% Y (30Y) magnetic powders. The observed magnetic properties demonstrated that the coercivity of the three-layer magnet was ~ 0.23 T higher than that of the DMP magnet, leading to improved coercivity stability at high temperatures. Furthermore, the microstructural observations and elemental analyses indicated the presence of a ~ 200-μm-thick interface layer at the contact site between the 0Y and 30Y magnetic layers. Thus, the proposed approach effectively suppressed the excessive diffusion of Y in (Nd,Y)–Fe–B magnets, thereby enhancing the magnetic performance of the sintered magnets.
期刊介绍:
Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.