| Crystallization kinetics of （Ni0.75Fe0.25）78-xNbxSi10B12 （x = 0, 5） amorphous alloys |
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| 作者姓名： | CHEN Xueding WEI Hengdou WANG Xiaojun |
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| 作者单位： | State Key Laboratory of Advanced New Non-ferrous Materials, l.anzhou University of Technology, l.anzhou 730050, China |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | Amorphous ribbons of （Ni0.75Fe0.25）78-xNbxSi10B12 （x = 0, 5） were prepared by a single roller melt-spinning technique in air atmosphere. The crystallization kinetics of the alloys were investigated by means of continuous heating, and the activation energies of the alloys were calculated using Kissinger plot method and Ozawa plot method on the basis of differential thermal analysis data. The crystallization products were analyzed by X-ray diffraction. After the （Ni0.75Fe0.25）78Si10B12 amorphous alloy was annealed at the temperatures 715 and 745 K, a single phase of γ-（Fe, Ni） solid solution with grain sizes of about 10.3 and 18.5 nm, respectively, precipitates in the amorphous matrix. The crystallized phases are γ-（Fe, Ni） solid solution, Fe2Si, Ni2Si, and Fe3B after annealing at 765 K. The （Ni0.75Fe0.25）73NbsSi10 B12 amorphous alloy was annealed at 720, 750, and 800 K; and the crystallization phases, γ（Fe, Ni） solid solution, （Fe, Ni）23B6. Ni31Si12 and Nb2NiB0.16 form simultaneously.
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| 关 键 词： | 非晶态 热分析 结晶动力学 活化能 无定形合金 |
| 收稿时间： | 2005-08-11 |
Crystallization kinetics of (Ni0.75Fe0.25)78-xNbxSi10B12 (x = 0, 5) amorphous alloys |
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| CHEN Xueding WEI Hengdou WANG Xiaojun.Crystallization kinetics of (Ni0.75Fe0.25)78-xNbxSi10B12 (x = 0, 5) amorphous alloys[J].Rare Metals,2006,25(4):342-348. |
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| Authors: | CHEN Xueding WEI Hengdou WANG Xiaojun |
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| Affiliation: | 1. Department of Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, PR China;2. State Key Lab of Fine Chemicals, Carbon Research Laboratory, Center for Nano Materials and Science, School of Chemical Engineering, Dalian University of Technology, 2 Linggong Road, Dalian 116024, PR China;1. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, China;2. National Engineering Laboratory for Industrial Wastewater Treatment, East China University of Science and Technology, Shanghai 200237, China;1. Department of Materials Physics, Montanuniversitaet Leoben, Austria;2. Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Leoben, Austria |
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| Abstract: | Amorphous ribbons of (Ni0.75Fe0.25)78-xNbxSi10B12 (x = 0, 5) were prepared by a single roller melt-spinning technique in air atmosphere. The crystallization kinetics of the alloys were investigated by means of continuous heating, and the activation energies of the alloys were calculated using Kissinger plot method and Ozawa plot method on the basis of differential thermal analysis data. The crystallization products were analyzed by X-ray diffraction. After the (Ni0.75Fe0.25)78Si10B 12amorphous alloy was annealed at the temperatures 715 and 745 K, a single phase of γ-(Fe, Ni) solid solution with grain sizes of about 10.3 and 18.5 nm, respectively, precipitates in the amorphous matrix. The crystallized phases are γ-(Fe, Ni) solid solution, Fe2Si, Ni2Si, and Fe3B after annealing at 765 K. The (Ni0.75Fe0.25)73Nb5Si10 B12 amorphous alloy was annealed at 720, 750, and 800 K; and the crystallization phases, γ-(Fe, Ni) solid solution, (Fe, Ni)23B6, Ni31Si12 and Nb2NiB0.16 form simultaneously. |
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| Keywords: | amorphous materials thermal analysis crystallization kinetics activation energy |
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