Phase evolution and magnetic properties of boron enriched (Nd0.7Pr0.25La0.05)xFebal.Co10Ti2By (x=4.5–10.7; y=10.9–18.6) nanocomposites
Phase evolution and magnetic properties of boron enriched (Nd0.7Pr0.25La0.05)xFebal.Co10Ti2By (x=4.5–10.7; y=10.9–18.6) nanocomposites
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富硼(Nd0.7Pr0.25La0.05)xFebal.Co10Ti2By (x=4.5–10.7; y=10.9–18.6)纳米复合材料的相演化和磁性能
DOI：
10.1016/s0304-8853(01)00613-8
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发表时间：
2002
影响因子：
2.7
通讯作者：
B. Ma
中科院分区：
文献类型：
--
作者：
W. Chang;J. Wen;H. Chang;M. D. Lee;B. Ma
采用熔体快淬法制备了（Nd0.7Pr0.25La0.05）xFebal.Co10Ti2By合金薄带，其中（x，y）=（10.7，10.9），（10.3，11.3），（9.7，12.1），（8.4，13.7），（7.1，15.3），（5.8，16.9）和（4.5，18.6），以研究其相演变和控制其磁性能的关键因素。X射线衍射和热磁分析（TMA）表明，合金薄带的相组成顺序为α-Fe/R2 Fe 14 B → R2 Fe 23 B3/R2 Fe 14 B → R2 Fe 23 B3 → Fe 3B/R2 Fe 23 B3/α-Fe。R_2Fe_（14）B相的量对确定Br、iHc和（BH）_（max）是非常关键的。一般来说，Br、iHc和（BH）max随着硼含量的增加而减小，并且当在薄带中仅存在R2 Fe 23 B3时达到局部最小值，例如具有标称成分（x，y）=（5.8，16.9）的样品。大量R2 Fe_（23）B_3的存在以及R2 Fe_（14）B的减少是导致薄带热稳定性下降的原因。同时，各相的平均晶粒尺寸对所研究薄带的Brand（BH）max也有重要影响。
Alloy ribbons of (Nd0.7Pr0.25La0.05)xFebal.Co10Ti2By, where (x,y)=(10.7, 10.9), (10.3, 11.3), (9.7, 12.1), (8.4, 13.7), (7.1, 15.3), (5.8, 16.9) and (4.5, 18.6), were prepared by melt spinning method to investigate the phase evolution and key factors controlling their magnetic properties. X-ray diffraction and thermal magnetic analysis (TMA) revealed that the phase mixtures of these alloy ribbons changed in the sequence of α-Fe/R2Fe14B→R2Fe23B3/R2Fe14B→R2Fe23B3→Fe3B/R2Fe23B3/α-Fe. The amount of R2Fe14B phase is very critical in determining the Br,iHcand (BH)maxobtained. In general, the Br,iHcand (BH)maxdecrease with increasing boron content and reach local minimum when only R2Fe23B3was present in ribbons, for example sample with a nominal composition of (x,y)=(5.8, 16.9). The presence of a large amount R2Fe23B3, with the diminution of R2Fe14B, is responsible for degradation of thermal stability of the ribbons. In the meantime, the average grain size of individual phases also showed a crucial influence on the Brand (BH)maxof ribbons studied.
影响因子：
3.2
作者：
Bauer, J;Seeger, M;Kronmuller, H
通讯作者：
Kronmuller, H