物理学报2011，Vol.60Issue(5)：620-626,7.
添加Dy元素对钕铁硼速凝片微观组织和磁特性的影响
Effect of Dy additive on microstructure and magnetic properties of rapidly solidified Nd-Fe-B strips
摘要
Abstract
Sintered Nd-Fe-B magnets made from strip cast alloys have been studied extensively owing to their strong permanent magnetic properties. Up to now the studies mainly focus on technology parameters of strip casting, including casting temperature, wheel speed and phase transition temperature and so on. However, microstructure and properties of rapidly solidified strips could be influenced by the composition of alloy. In this work, the effects of added Dy element on microstructures and properties of Nd-Fe-B rapidly solidified strips have been investigated. The strips shad a pronounced texture of the tetragonal T1 (2: 14:1 ) phase as shown by the prominent (00l) peaks at wheel surface. The alignment coefficient of the strips was the highest when Dy content ranged from 1 to 2at％. This is the result of the microstructure of strips being optimized through an appropriate amount of Dy addition. At the same time, the volume fraction of isotropic crystal decreased as Dy content increased. It revealed that the oxidation speed decreased with increasing Dy content.关键词
速凝片/织构/微观组织/氢破Key words
strip casting/ texture/ microstructure/ hydrogen decrepitation引用本文复制引用
丁勇,陈仁杰,郭帅,刘兴民,李东,闫阿儒..添加Dy元素对钕铁硼速凝片微观组织和磁特性的影响[J].物理学报,2011,60(5):620-626,7.基金项目
宁渡市攻关项目(批准号:2008B10024),浙江省自然科学基金(批准号:Y407174)和国家自然基金科技部项目(批准号:2010B34601)资助的课题. （批准号:2008B10024）
