- The Fabrication of Al-Cu Alloy Nano Powders by a New Method Combining Electrodeposition and Electrical Wire Explosion
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Je-Shin Park, Chang-Youl Suh, Han-Kwon Chang, Jae-Chun Lee, Won-Baek Kim
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J Korean Powder Metall Inst. 2006;13(3):187-191.
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DOI: https://doi.org/10.4150/KPMI.2006.13.3.187
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 Abstract
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- Al-Cu alloy nano powders were produced by the electrical explosion of Cu-plated Al wires. The composition and phase of the alloy could be controlled by varying the thickness of Cu deposit on Al wire. When the Cu layer was thin, Al solid solution and CuAl_2 were the major phases. As the Cu layer becomes thicker, Al diminished while Al_4Cu_9 phase prevailed instead. The average particle size of Al-Cu nano powders became slightly smaller from 63 nm to 44 nm as Cu layer becomes thicker. The oxygen content of Al-Cu powder decreased linearly with Cu content. It is well demonstrated that the electrodeposition combined with wire explosion could be simple and economical means to prepare variety of alloy and intermetallic nano powders.
- Hydrogen Absorption Properties of Nanocrystalline Zr57V36Fe7 Getter alloy
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Je-Shin Park, Chang-Youl Suh, Won-Baek Kim
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J Korean Powder Metall Inst. 2005;12(6):433-440.
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DOI: https://doi.org/10.4150/KPMI.2005.12.6.433
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Abstract
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- The hydrogen sorption speed of Zr_57V_36Fe_7 nanocrystalline and amorphous alloys was evaluated at room temperature. Nanocrystalline alloys of Zr_57V_36Fe_7 were prepared by planetary ball milling. The hydrogen sorption speed of nanocrystalline alloys was higher than that of the amorphous alloy. The enhanced sorption speed of nanocrystalline alloys was explained in terms of surface oxygen stability which has been known to retard the activation of amorphous alloys. The retardation can be reduced by formation of nanocrystals, which results in the observed increase in sorption properties.
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