Intermediate hydrogenation phase in the hydrogenation–disproportionation–desorption–recombination process of Nd2Fe14B-based anisotropic magnets
Intermediate hydrogenation phase in the hydrogenation–disproportionation–desorption–recombination process of Nd2Fe14B-based anisotropic magnets
复制标题
DOI：
10.1016/s1359-6454(98)00399-1
复制
发表时间：
1999-02
期刊：
影响因子：
9.4
通讯作者：
T. Tomida;N. Sano;K. Hanafusa;H. Tomizawa;S. Hirosawa
中科院分区：
文献类型：
--
作者：
T. Tomida;N. Sano;K. Hanafusa;H. Tomizawa;S. Hirosawa
为了解Nd 2Fe 14 B基各向异性磁体氢化-氢化-脱附-再结合过程中的氢化和各向异性诱导机制，采用透射电镜研究了Nd13.0Fe 67.9Co 11.0B 7.0Ga 1.0Zr 0.1合金的氢化结构.在氢化反应的早期阶段，出现了一个中间氢化相t-Fe_3B（t-Fe_3B）。t-Fe 3B具有晶格相干性，并与母相Nd 2Fe 14 B具有相关的“一对一”取向关系。在t-Fe_3B晶粒内，细小的Nd_2Fe_（14）B颗粒与Nd_（H_2）颗粒一起沿着存在。Nd_2Fe_（14）B颗粒的直径约为50 nm，与原始Nd_2Fe_（14）B颗粒的取向接近。提出了一个各向异性介导的中间加氢反应方案。
To understand the disproportionation and anisotropy-inducing mechanism of the hydrogenation–disproportionation–desorption–recombination process of Nd2Fe14B-based anisotropic magnets, the disproportionated structure of Nd13.0Fe67.9Co11.0B7.0Ga1.0Zr0.1alloys has been investigated via transmission electron microscopy. An intermediate hydrogenation phase of the tetragonal Fe3B (t-Fe3B) has been revealed to appear in the early stage of disproportionation. The t-Fe3B possesses lattice coherency and an associated “one-to-one” orientation relationship with the parent Nd2Fe14B phase. Within the t-Fe3B grain, fine Nd2Fe14B particles exist along with NdH2particles. The diameter of the Nd2Fe14B particles is around 50nm, and they have close orientation to that of original Nd2Fe14B. An anisotropy-mediating disproportionation scheme with the intermediate hydrogenation phase is proposed.