EFFECT OF HEAT-TREATMENT ON THE PHASES OF MELT-SPUN NDFEB ALLOYS
文献类型：期刊论文
| 作者 | CHENG, ZH ; MAO, MX ; YANG, CL ; ZHANG, YD ; LI, FS ; SHEN, BG ; ZHANG, JX ; SUN, JJ |
| 刊名 | JOURNAL OF APPLIED PHYSICS
 |
| 出版日期 | 1994 |
| 卷号 | 76期号:5页码:2981 |
| 关键词 | PERMANENT-MAGNET MATERIALS MAIN PHASE MOSSBAUER ND2FE14B NMR CRYSTALLIZATION ND4FE77B19 COMPONENTS FE3B |
| ISSN号 | 0021-8979 |
| 通讯作者 | CHENG, ZH: CHINESE ACAD SCI,INST PHYS,STATE KEY LAB MAGNETISM,BEIJING 100080,PEOPLES R CHINA. |
| 中文摘要 | The phase composition of crystallized NdxFe81.5-xB18.5 (x = 3, 4, 4.5, 6, 12, and 15) alloys annealed under optimal condition are investigated by means of zero-field spin-echo nuclear magnetic resonance (NMR) and Mossbauer effect (ME), together with x-ray diffraction (XRD). It is found that the phase composition depends on the Nd concentration. The samples with 12-16 at. %-Nd contain Nd2Fe14B magnetically hard phase and Nd1.1Fe4B4 paramagnetic phase. Their large coercive fields are due to the very fine size of Nd2Fe14B crystallite below the critical size of single domain particles, and some minor phases precipitated at grain boundaries, which have a pinning domain wall effect. The samples with a lower Nd concentration (x = 3-6 at. %) consist of body-centered-tetragonal (bct)-Fe3B and a small amount of alpha-Fe, and no Nd2Fe14B and Nd1.1Fe4B4. Furthermore, the NMR results show that the spectra corresponding to bct-Fe3B in the samples annealed at 670-degrees-C distort and broaden more seriously than that of pure bct-Fe3B in the Nd4Fe77.5B18.5 alloy annealed at 839-degrees-C, and the difference of their spin-lattice and spin-spin relaxation time is very large, implying that B atoms have at a different nearest-neighbor environment. Thus, it is reasonable to assume that Nd atoms enter into bct-Fe3B and that such a compound has a large coercive field. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/36450]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | CHENG, ZH,MAO, MX,YANG, CL,et al. EFFECT OF HEAT-TREATMENT ON THE PHASES OF MELT-SPUN NDFEB ALLOYS[J]. JOURNAL OF APPLIED PHYSICS,1994,76(5):2981. |
| APA | CHENG, ZH.,MAO, MX.,YANG, CL.,ZHANG, YD.,LI, FS.,...&SUN, JJ.(1994).EFFECT OF HEAT-TREATMENT ON THE PHASES OF MELT-SPUN NDFEB ALLOYS.JOURNAL OF APPLIED PHYSICS,76(5),2981. |
| MLA | CHENG, ZH,et al."EFFECT OF HEAT-TREATMENT ON THE PHASES OF MELT-SPUN NDFEB ALLOYS".JOURNAL OF APPLIED PHYSICS 76.5(1994):2981. |
入库方式： OAI收割
来源：物理研究所
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