Phase transformation and magnetic properties of Fe-Pt-based bulk alloys
文献类型：期刊论文
| 作者 | Q. F. Xiao ; E. Bruck ; Z. D. Zhang ; F. R. de Boer ; K. H. J. Buschow |
| 刊名 | Journal of Alloys and Compounds
 |
| 出版日期 | 2004 |
| 卷号 | 364期号:1-2页码:315-322 |
| 关键词 | transition metal compounds permanent magnets phase transition magnetic measurements l1(0) |
| ISSN号 | 0925-8388 |
| 中文摘要 | The ordering transformation and magnetic properties of Fe59.75Pt39.5Nb0.75 bulk alloys have been investigated in detail by using different homogenization temperatures and different low-temperature annealing times to obtain samples with different microstructure and different atomically ordered states. The experimental results indicate that the disorder-order transformation temperature for the presently studied alloys is around 950degreesC. When using high homogenization temperatures (in the range 1100-1350degreesC) and medium quenching rates, one can reach high nucleation rates of the atomically ordered phase, so that a fine microstructure of ordered regions with dimensions of 10-20 nm is obtained. A uniform nanoscale microstructure with a wide distribution in the degree of order can be obtained by properly controlling the quenching rate and the annealing time. In this way, a high remanence ratio (M-r = 0.74) can be obtained by profiting from the nanocomposite exchange coupling between nearest-neighbor ordered regions with different magnetic anisotropy. We found that, in the present off-stoichiometric magnetic alloy system, the fct phase is magnetically not very hard, like the Nd2Fe14B phase, and that the fcc phase is not truly magnetically soft due to an increase in the degree of atomic order. Therefore, the samples do not possess the features of an exchange spring magnet as the iron-rich Nd-Fe-B magnets, although the exchange coupling still results in a strong remanence enhancement. (C) 2003 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/35652]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Q. F. Xiao,E. Bruck,Z. D. Zhang,et al. Phase transformation and magnetic properties of Fe-Pt-based bulk alloys[J]. Journal of Alloys and Compounds,2004,364(1-2):315-322. |
| APA | Q. F. Xiao,E. Bruck,Z. D. Zhang,F. R. de Boer,&K. H. J. Buschow.(2004).Phase transformation and magnetic properties of Fe-Pt-based bulk alloys.Journal of Alloys and Compounds,364(1-2),315-322. |
| MLA | Q. F. Xiao,et al."Phase transformation and magnetic properties of Fe-Pt-based bulk alloys".Journal of Alloys and Compounds 364.1-2(2004):315-322. |
入库方式： OAI收割
来源：金属研究所
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