Magnetic hardening in Fe3B∕Nd2Fe14B nanocomposite magnets induced by rapid thermal annealing
Magnetic hardening in Fe3B∕Nd2Fe14B nanocomposite magnets induced by rapid thermal annealing
复制标题
快速热退火诱导 Fe3B∕Nd2Fe14B 纳米复合磁体的磁硬化
DOI：
10.1063/1.2151813
复制
发表时间：
2006
影响因子：
3.2
通讯作者：
S. Tajima
中科院分区：
文献类型：
--
作者：
J. Shih;A. Saldanha;Kiyonori Suzuki;T. Shoji;A. Kato;S. Tajima
研究了熔纺非晶 Fe82−xNdxB18 (x=3-5.5) 和 Fe82−zNd5B18Mz (M=Ti、V 和 Cr；z=1.5-5) 合金在一定加热速率（0.042 至 8.3K∕s）下的分解行为。纳米晶化时的加热速率对Fe79Nd3B18和Fe77Nd5B18的结构和磁性能影响很小。相比之下，Fe77.5Nd4.5B18中Nd2Fe14B的Fe57穆斯堡尔谱面积随着加热速率的增加而明显增大，矫顽力也增强。掺杂V和Cr的Fe77Nd5B18在3.3K∕s的高速率下加热时，其矫顽力也增强至200-430kA∕m。快速热退火可有效提高磁硬度，特别是当 Nd2Fe14B 的亚稳态适度降低时。
The decomposition behaviors of melt-spun amorphous Fe82−xNdxB18 (x=3-5.5) and Fe82−zNd5B18Mz (M=Ti, V, and Cr; z=1.5-5) alloys under a range of heating rates (0.042 to 8.3K∕s) have been investigated. The heating rate upon nanocrystallization has little effect on the structural and magnetic properties in both Fe79Nd3B18 and Fe77Nd5B18. In contrast, the Fe57 Mossbauer spectral area of Nd2Fe14B in Fe77.5Nd4.5B18 shows a clear increase with increasing heating rate, and the coercivity is enhanced. The coercivity of Fe77Nd5B18 doped with V and Cr is also enhanced to 200-430kA∕m when heated at a high rate of 3.3K∕s. Rapid thermal annealing is effective in enhancing magnetic hardness, in particular, when the metastability of Nd2Fe14B is moderately demoted.