| Preparation and mechanism study of bulk pure rare-earth metals with amorphous and nanocrystalline structures |
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| 作者姓名： | LI ErDong SONG XiaoYan ZHANG JiuXing LU NianDuan |
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| 作者单位： | College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education, BeijingUniversity of Technology, Beijing 100022, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China （Grant No. 50401001）, the Research Fund for the Doctoral Program of Higher Education （Grant No. 20050005011）, and the Key Project of Science ＆ Technology Innovation Engineering, the Chinese Ministry of Education （Grant No. 705004） |
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| 摘 要： | The preparation and the mechanism study of bulk pure rare-earth metals with amorphous and nanocrystalline structures, which were produced by spark plasma sintering (SPS), were carried out in this paper. With different processing parameters, the amorphous, two phases of amorphous and nanocrystalline, and complete nanocrystalline microstructures have been obtained. The nano-grain sizes in the bulk nanocrystalline materials are found smaller than the original powder particles sizes, which may change the conventional viewpoint that the grains in the sintered bulk are generally coarser than the raw powder particles. The technique developed in the present work can be extended to the preparation of many other nano bulk metal materials, and thus enables the studies of the nano-size effects on the physical, chemical and mechanical properties of bulk nano materials.
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| 关 键 词： | 块状 稀土金属 非晶态结构 纳米晶结构 火花等离子体烧结 制备 机制 纳米材料 |
| 收稿时间： | 20 February 2006 |
| 修稿时间： | 2006-02-202006-08-18 |
Preparation and mechanism study of bulk pure rare-earth metals with amorphous and nanocrystalline structures |
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| LI ErDong SONG XiaoYan ZHANG JiuXing LU NianDuan.Preparation and mechanism study of bulk pure rare-earth metals with amorphous and nanocrystalline structures[J].Chinese Science Bulletin,2007,52(3):418-422. |
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| Authors: | Li ErDong Song XiaoYan Zhang JiuXing Lu NianDuan |
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| Institution: | (1) College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing, 100022, China |
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| Abstract: | The preparation and the mechanism study of bulk pure rare-earth metals with amorphous and nanocrystalline structures, which were produced by spark plasma sintering (SPS), were carried out in this paper. With different processing parameters, the amorphous, two phases of amorphous and nanocrystalline, and complete nanocrystalline microstructures have been obtained. The nano-grain sizes in the bulk nanocrystalline materials are found smaller than the original powder particles sizes, which may change the conventional viewpoint that the grains in the sintered bulk are generally coarser than the raw powder particles. The technique developed in the present work can be extended to the preparation of many other nano bulk metal materials, and thus enables the studies of the nano-size effects on the physical, chemical and mechanical properties of bulk nano materials. |
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| Keywords: | rare-earth nano materials amorphous bulk nanocrystallization spark plasma sintering |
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