磁铁
剩磁
材料科学
矫顽力
各向同性
各向异性
纳米复合材料
微观结构
纹理(宇宙学)
复合材料
变形(气象学)
磁各向异性
凝聚态物理
冶金
磁化
磁场
光学
机械工程
物理
量子力学
工程类
图像(数学)
人工智能
计算机科学
作者
Ming Yue,Pengcheng Niu,Y. L. Li,D. T. Zhang,W. Q. Liu,J. X. Zhang,Christina Chen,S. Liu,D. Lee,A. Higgins
摘要
Chemical coating, hot compaction, and hot deformation techniques have been applied to prepare bulk isotropic and anisotropic Nd2Fe14B∕α-Fe nanocomposite magnets. The effect of α-Fe content on the structure and magnetic properties of the magnets were studied. For the isotropic magnets, the remanence (Br) increases as the α-Fe content increases, while the coercive force (Hci) drops simultaneously. For the anisotropic magnets, the Br rises first, peaking at 2vol% of α-Fe content, then falls as the α-Fe content increases, and Hci drops significantly for all the α-Fe containing anisotropic magnets. Crystal structure analysis shows that only the magnets with no more than 2vol% α-Fe exhibit strong c-axis crystal texture of Nd2Fe14B phase after deformation. Microstructure observation also shows that there are many Nd2Fe14B equiaxial grains even after hot deformation in the magnets with α-Fe more than 2vol%.
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