Evolution of the microstructure of rapidly solidified Nd‐Fe‐B permanent magnets
Evolution of the microstructure of rapidly solidified Nd‐Fe‐B permanent magnets
复制标题
快速凝固Nd-Fe-B永磁体微观结构的演变
DOI：
10.1063/1.347765
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
R. Mishra
中科院分区：
文献类型：
--
作者：
T. Chu;L. Rabenberg;R. Mishra
通过快速凝固制备的Nd-Fe-B永磁体在其发展的所有阶段都已通过透射电子显微镜进行了广泛的表征。初生薄带中的晶粒的最大尺寸可达几微米。在凝固过程中，过量的Nd被捕获在一些较大的晶粒中;在随后的加工过程中，过量的Nd从晶格中分离出来，形成富Nd的连贯沉淀物。在带材的固结过程中，表面氧化膜被破坏，产生紧密的冶金结合，并允许在原始带材界面上发生晶粒生长。最终磁体中的大部分晶粒呈板状，具有共同的c轴，并且平行于模具镦锻的轴;这些晶粒被富Nd晶界相包围。
Nd‐Fe‐B permanent magnets prepared by rapid solidification have been extensively characterized by transmission electron microscopy at all stages of their development. Grains in the as‐spun ribbons range in size up to several micrometers in their largest dimension. Excess Nd is trapped within some of the larger grains during solidification; this excess Nd separates from the lattice during subsequent processing, forming Nd‐rich, coherent, precipitates. During consolidation of the ribbons, the surface oxide films are broken, creating intimate metallurgical bonds and allowing grain growth to occur across the original ribbon interfaces. The bulk of the grains in the final magnet are plate shaped, having a c axis in common and parallel to the axis of die upsetting; these grains are surrounded by the Nd‐rich grain‐boundary phase.
影响因子：
3.2
作者：
SAGAWA, M;FUJIMURA, S;MATSUURA, Y
通讯作者：
MATSUURA, Y