Thermal expansion behavior of sintered Nd–Fe–B magnets with different Co contents and orientations
作者机构：Division of Functional MaterialCentral Iron&Steel Research InstituteBeijing 100081China
出 版 物：《Chinese Physics B》 (中国物理B（英文版）)
年 卷 期：2023年第32卷第5期
页 面：573-579页
核心收录：
学科分类：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]
基 金：the National Key Research and Development Program of China (Grant No. 2021YFB3502900) the National Natural Science Foundation of China (Grant No. 51871063) the Key Technology Research and Development Program of Shandong Province, China (Grant No. 2019JZZY020210) the Major Projects in Inner Mongolia Autonomous Region, China
主 题：thermal expansion sintered Nd–Fe–B magnets orientation Co content
摘 要：The thermal expansion behavior of sintered Nd–Fe–B magnets is a crucial parameter for production and ***, this aspect has not been thoroughly investigated. In this study, three different sintered Nd–Fe–B magnets with varying Co content(Co = 0, 6, 12 wt%) were prepared using the conventional powder metallurgy method, and four magnets oriented under different magnetic fields were prepared to compare. The thermal expansion behavior for the magnets was investigated using a linear thermal dilatometry in the temperature range of 20℃–500℃. It was found that, the coefficient of thermal expansion(CTE) increases with the increase of Co contents, while the anisotropy of thermal expansion *** introduction of Co leads to continuous changes from negative to positive thermal expansion in the vertically oriented direction, which is important for the development of zero thermal expansion magnets. The thermal expansion of nonoriented magnets was found to be isotropic. Additionally, the anisotropy of thermal expansion increases with the increase of orientation degree. These results have important implications for the development of sintered Nd–Fe–B with controllable CTE.
维普期刊数据库
同方期刊数据库