| 退火晶化过程中Ni-B纳米非晶态合金的结构 |
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| 引用本文： | 韦世强,张新夷,刘文汉,王晓光,杨宏伟,闫文胜.退火晶化过程中Ni-B纳米非晶态合金的结构[J].物理化学学报,2001,17(8):750-752. |
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| 作者姓名： | 韦世强 张新夷 刘文汉 王晓光 杨宏伟 闫文胜 |
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| 作者单位： | National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029 |
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| 基金项目： | 国家自然科学基金和中国科学院“百人计划”资助项目 |
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| 摘 要： | 采用XAFS和XRD两种方法研究化学还原法制备的Ni B纳米非晶态合金在退火过程中的结构变化.我们发现，在573 K左右的退火温度下, Ni B纳米非晶态合金生成亚稳的纳米晶Ni和Ni3B.在773 K或更高的退火温度下， Ni B纳米非晶态合金大部分晶化为晶态金属Ni.
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| 关 键 词： | XAFS XRD Ni-B纳米非晶态合金 |
| 收稿时间： | 2001-01-08 |
| 修稿时间： | 2001年1月8日 |
Structural Study of Ni-B Ultrafine Amorphous Alloy during Annealed Crystallization |
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| Wei Shi-Qiang,Zhang Xin-Yi,Liu Wen-Han,Wang Xiao-Guang,Yang Hong-Wei,Yan Wen-Sheng.Structural Study of Ni-B Ultrafine Amorphous Alloy during Annealed Crystallization[J].Acta Physico-Chimica Sinica,2001,17(8):750-752. |
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| Authors: | Wei Shi-Qiang Zhang Xin-Yi Liu Wen-Han Wang Xiao-Guang Yang Hong-Wei Yan Wen-Sheng |
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| Institution: | National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029 |
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| Abstract: | X-ray absorption fine structure (XAFS) and X-ray diffraction (XRD) have been combined to in- vestigate the structure of Ni-B ultrafine amorphous alloy prepared by chemical reduction during the crystallization process. The results demonstrate that a fcc-like nanocrystalline Ni phase with a medium-range order and a nanocrystalline Ni3B alloy are formed at 573 K where the first exothermic process is observed. At annealing temperature of 773 K, large amount of Ni-B ultrafine amorphous alloy decomposes into metal Ni. |
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| Keywords: | XAFS XRD Ni-B ultraine amorphous alloy |
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