高温度稳定性烧结Nd-Fe-B研究进展  

Research progress of high temperatures stable sintered Nd-Fe-B magnets

作　　者：徐吉元 胡成林 张家滕 董生智[1] 陈红升[1] XU Jiyuan;HU Chenglin;ZHANG Jiateng;DONG Shengzhi;CHEN Hongsheng(Division of Functional Materials,Central Iron and Steel Research Institute,Beijing 100081,China;Beijing Keeven Aviation Instrument Co.,Ltd.,Beijing 102402,China)

机构地区：[1]钢铁研究总院功能材料研究院,北京100081 [2]北京青云航空仪表有限公司,北京102402

出　　处：《金属功能材料》2022年第1期106-116,共11页Metallic Functional Materials

基　　金：国家重点研发计划资助(2021YFB3502900)。

摘　　要：随着中国新能源汽车和国防军工等领域的发展,对钕铁硼磁体的温度稳定性提出了更高的要求。基于国内外研究进展,对钕铁硼温度稳定性研究的两个方向进行了综述,一是围绕提高钕铁硼最高使用温度的相关研究,对矫顽力、矫顽力温度系数、方形度和磁体最高使用温度内在关联进行了重点介绍;二是围绕降低钕铁硼磁体的剩磁温度系数的相关研究,就Co和重稀土对磁体温度系数和微观组织的影响机制进行了阐述。With the development of new energy vehicles and national defense industry in China,higher requirements are put forward for the temperature stability of Nd-Fe-B.Based on the latest domestic and overseas developments,summarized two directions of the temperature stability of sintered Nd-Fe-B.One was focus on increasing the maximum operating temperature of Nd-Fe-B.The internal correlation between coercivity,coercivity temperature coefficient,squareness and the maximum service temperature was introduced.The second was focus on reducing the remanence temperature coefficient of Nd-Fe-B magnet.The influence mechanism of Co and heavy rare earth on the temperature coefficient and microstructure of the magnet was described in detail.

关 键 词：钕铁硼 温度稳定性 最高使用温度 温度系数 

分 类 号：TM273[一般工业技术—材料科学与工程]