铝替代对合成的Mg<sub>2</sub>Cu纳米颗粒相演变的影响

Elham Mohseni-Sohi; Farshid Kashani Bozorg

doi:10.1007/s12613-021-2368-1

Volume 30 Issue 1

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(1): 63-71

Elham Mohseni-Sohi and Farshid Kashani Bozorg, Effect of Al substitution on phase evolution in synthesized Mg₂Cu nanoparticles, Int. J. Miner. Metall. Mater., 30(2023), No. 1, pp. 63-71. https://doi.org/10.1007/s12613-021-2368-1

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Elham Mohseni-Sohi and Farshid Kashani Bozorg, Effect of Al substitution on phase evolution in synthesized Mg2Cu nanoparticles, Int. J. Miner. Metall. Mater., 30(2023), No. 1, pp. 63-71. https://doi.org/10.1007/s12613-021-2368-1

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研究论文

铝替代对合成的Mg₂Cu纳米颗粒相演变的影响

School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, PO Box 11155/4563, Iran

通讯作者:
Elham Mohseni-Sohi E-mail: elham.mohseni@stud.tu-darmstadt.de

中文摘要

研究了用Al替代Mg对Mg₂Cu粉末混合物的放电能力的影响。通过机械合金化（MA）技术，用高能行星式球磨机制备纳米晶体粉末的混合物。此外，不同摩尔数的Al（0.05, 0.1, 0.15, 0.2和0.3 M）被替换到Mg₂Cu粉末中。利用X射线衍射（XRD）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）分析结构、形态和晶粒大小的变化。获得的粉末用作镍金属氢化物电池（Ni–MH）的阳极。在铝含量为0.05 M的试样中，经过5 h的研磨，出现了Mg₂Cu的正方体结构。结果显示，超过0.1 M的Al替代会导致MgCu₂峰的出现。铝的替代并不影响微观结构的均匀性；然而，它导致晶体尺寸和晶格参数的减少。选区衍射（SAD）图表明具有Mg_1.9Al_0.1Cu化学成分和20 h研磨的电极具有最大的放电容量。

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Research Article

Effect of Al substitution on phase evolution in synthesized Mg₂Cu nanoparticles

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Abstract

Abstract

The effect of Mg replacement with Al on the discharge capacity of Mg₂Cu powder mixture was investigated. The mixture of nanocrystalline powder was prepared via mechanical alloying (MA) technique with a high energy planetary ball mill. In addition, different moles of Al (0.05, 0.1, 0.15, 0.2, and 0.3 M) were substituted to Mg₂Cu powder. X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to analyze changes in structure, morphology, and grain size. The obtained powder was utilized as an anode in a nickel–metal hydride battery (Ni–MH). In the specimens with 0.05 M Al content, the orthorhombic structure of Mg₂Cu is emerged after 5 h milling. The results reveal that more than 0.1 M Al substitution leads to an appearance of MgCu₂ peaks. Al substitution does not affect microstructure uniformity; however, it causes a decrease in crystalline size and lattice parameters. The selected area diffraction (SAD) pattern elucidates that the electrode with the Mg_1.9Al_0.1Cu chemical composition and 20 h milling has the maximum discharge capacity.
- Mg₂Cu;
- mechanical alloying;
- nanocrystalline;
- discharge capacity

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铝替代对合成的Mg₂Cu纳米颗粒相演变的影响

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Effect of Al substitution on phase evolution in synthesized Mg₂Cu nanoparticles

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铝替代对合成的Mg2Cu纳米颗粒相演变的影响

中文摘要

Effect of Al substitution on phase evolution in synthesized Mg2Cu nanoparticles

Abstract

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铝替代对合成的Mg₂Cu纳米颗粒相演变的影响

Effect of Al substitution on phase evolution in synthesized Mg₂Cu nanoparticles