| Characteristics of mechanical alloyed Ni-Al powder for sintering |
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| 引用本文： | MENG Jie JIA Chengchang HE Qing. Characteristics of mechanical alloyed Ni-Al powder for sintering[J]. 稀有金属(英文版), 2007, 26(4): 372-376. DOI: 10.1016/S1001-0521(07)60231-9 |
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| 作者姓名： | MENG Jie JIA Chengchang HE Qing |
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| 作者单位： | Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China |
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| 摘 要： | Mechanical alloying was employed to obtain high-activity Ni-AI powder. The effects of mechanical alloying on the microstructure and characteristics of milled powder with a normal composition of Ni-22.89 at.% AI-0.5 at.% B were investigated by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and transmission electron microscopy （TEM）. The results show that a solution Ni （AI） was obtained after milling. During mechanical alloying, the milled powder obtains extra surface energy and crystalline energy because the crystallite size becomes free and the lattice strain increases with the milling time prolonging. Furthermore, about 0.5 mol% oxide in the particles were formed after milling, and this kind of dis- persed oxide is effective to improve the properties of the sintered alloy by dispersion strengthening. It is confirmed that Ni3AI alloy with outstanding properties has been prepared with mechanical alloyed powders.
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| 关 键 词： | 金属间化合 合金 机械性能 X射线衍射 |
| 收稿时间： | 2006-07-13 |
| 修稿时间： | 2006-07-13 |
Characteristics of mechanical alloyed Ni-Al powder for sintering |
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| MENG Jie,JIA Chengchang,HE Qing. Characteristics of mechanical alloyed Ni-Al powder for sintering[J]. Rare Metals, 2007, 26(4): 372-376. DOI: 10.1016/S1001-0521(07)60231-9 |
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| Authors: | MENG Jie JIA Chengchang HE Qing |
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| Affiliation: | 1. Instituto de Tecnología de Materiales (ITM), Universidad Politécnica de Valencia (UPV), Camino de Vera s/n, 46022 Valencia, Spain;2. ITMA Materials Technology, Parque Tecnológico de Asturias, 33428 Llanera, Spain;3. Centro de Investigación en Nanomateriales y Nanotecnología (CSIC-UO-PA), Parque Tecnológico de Asturias, 33428 Llanera, Spain;4. Instituto de Cerámica y Vidrio (ICV-CSIC), E-28049 Madrid, Spain;1. Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Žižkova 22, 616 62 Brno, Czech Republic;2. Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16 Prague 2, Czech Republic;1. Dept. of Materials Science and Engineering, KTH Royal Institute of Technology, Brinellvagen 23, SE-10044 Stockholm, Sweden;2. Dept. of Materials and Nano Physics, KTH Royal Institute of Technology, Isafjordsgatan 22, SE-16440, Kista, Stockholm, Sweden;3. Dept. of Materials and Environmental Chemistry, Stockholm University, Stockholm, Sweden;4. Dept. of Energy Conversion and Storage, Technical University of Denmark, Denmark;1. Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan;2. Center for Advanced Research of Energy Conversion Materials, Hokkaido University, Sapporo 060-8628, Japan;1. Graduate School of Engineering, Tohoku University, Sendai, Miyagi 980-8579, Japan;2. Institute for Materials Research, Tohoku University, Sendai, Miyagi 980-8577, Japan |
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| Abstract: | Mechanical alloying was employed to obtain high-activity Ni-Al powder. The effects of mechanical alloying on the microstructure and characteristics of milled powder with a normal composition of Ni-22.89 at.% Al-0.5 at.% B were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results show that a solution Ni (Al) was obtained after milling. During mechanical alloying, the milled powder obtains extra surface energy and crystalline energy because the crystallite size becomes fine and the lattice strain increases with the milling time prolonging. Furthermore, about 0.5 mol% oxide in the particles were formed after milling, and this kind of dispersed oxide is effective to improve the properties of the sintered alloy by dispersion strengthening. It is confirmed that Ni3Al alloy with outstanding properties has been prepared with mechanical alloyed powders. |
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| Keywords: | intermetallics mechanical alloying X-ray diffraction powder metallurgy |
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