Effects of two-step annealing on the microstructures and soft magnetic properties of nanocrystalline Fe86Zr7B6Cu1 ribbons
The effects of two-step annealing on the microstructures and soft magnetic properties of nanocrystalline Fe86Zr7B6Cu1 ribbons were studied. Two-step annealing results in a marked decrease of grain size and a distinct improvement of soft magnetic properties with respect to conventional annealing at 6...
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| Veröffentlicht in: | Journal of alloys and compounds 2004-07, Vol.375 (1-2), p.233-238 |
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| container_end_page | 238 |
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| container_issue | 1-2 |
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| container_title | Journal of alloys and compounds |
| container_volume | 375 |
| creator | Tang, Jiancheng Mao, Xingyu Li, Shangdong Gao, Wenli Du, Youwei |
| description | The effects of two-step annealing on the microstructures and soft magnetic properties of nanocrystalline Fe86Zr7B6Cu1 ribbons were studied. Two-step annealing results in a marked decrease of grain size and a distinct improvement of soft magnetic properties with respect to conventional annealing at 600°C for 1h. Bcc α-Fe with the grain size of 8nm is formed in ribbon after it is pre-annealed at 750°C for 2min followed by annealing at 600°C for 58min. Its coercive force Hc, initial permeability μi, and relaxation frequency f0 are 1.5A/m, 6.15×104, and 8.9×104Hz, respectively. The decrease of grain size may result from a larger value of the nucleation rate obtained during the initial stage of crystallization by annealing amorphous ribbon at higher temperatures for short duration. But pre-annealing at 800°C leads to the decrease of soft magnetic properties because of the formation of Fe3Zr. |
| doi_str_mv | 10.1016/j.jallcom.2003.11.033 |
| format | Article |
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Two-step annealing results in a marked decrease of grain size and a distinct improvement of soft magnetic properties with respect to conventional annealing at 600°C for 1h. Bcc α-Fe with the grain size of 8nm is formed in ribbon after it is pre-annealed at 750°C for 2min followed by annealing at 600°C for 58min. Its coercive force Hc, initial permeability μi, and relaxation frequency f0 are 1.5A/m, 6.15×104, and 8.9×104Hz, respectively. The decrease of grain size may result from a larger value of the nucleation rate obtained during the initial stage of crystallization by annealing amorphous ribbon at higher temperatures for short duration. 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Two-step annealing results in a marked decrease of grain size and a distinct improvement of soft magnetic properties with respect to conventional annealing at 600°C for 1h. Bcc α-Fe with the grain size of 8nm is formed in ribbon after it is pre-annealed at 750°C for 2min followed by annealing at 600°C for 58min. Its coercive force Hc, initial permeability μi, and relaxation frequency f0 are 1.5A/m, 6.15×104, and 8.9×104Hz, respectively. The decrease of grain size may result from a larger value of the nucleation rate obtained during the initial stage of crystallization by annealing amorphous ribbon at higher temperatures for short duration. But pre-annealing at 800°C leads to the decrease of soft magnetic properties because of the formation of Fe3Zr.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2003.11.033</doi><tpages>6</tpages></addata></record> |
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| source | Elsevier ScienceDirect Journals |
| subjects | Amorphous materials Condensed matter: electronic structure, electrical, magnetic, and optical properties Crystal growth Exact sciences and technology Magnetic measurements Magnetic properties and materials Magnetic properties of nanostructures Microstructure Nanostructures Physics Transition metal alloys |
| title | Effects of two-step annealing on the microstructures and soft magnetic properties of nanocrystalline Fe86Zr7B6Cu1 ribbons |
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