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An investigation of the microstructure and hydrogenation/dehydrogenation properties of ball-milled CeMg12 alloys with Ni powders

  • Hu Feng , Zhang Yanghuan , Zhang Yin , Xu Jianyi , Cai Ying and Deng Leibo
Published/Copyright: January 11, 2014
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 105 Issue 1

Abstract

CeMg12 + 100 wt.% Ni composite hydrogen storage alloys were prepared using ball-milling. The phase structure, morphologies, and hydrogen absorption and desorption kinetics of these alloys were systematically investigated. The results show that the milled CeMg12 + 100 wt.% Ni alloys consisted of Mg2Ni and Ni phase with nanocrystalline and amorphous structures. Additionally, the volume fractions of the phase increased with prolonged ball-milling times, which improved the hydrogenation rates and the hydrogen storage capacities of the alloy samples. However, the dehydrogenation kinetics of the alloy samples were also impaired by the increased milling times. The poor dehydriding kinetics of the alloy samples milled for 80 h and 100 h were primarily attributed to grain size effects.

Keywords: Amorphous and nanocrystalline; Hydrogenation and dehydrogenation kinetics; Hydrogen diffusion coefficients; Hydrogen absorption and desorption ratios
* Correspondence address, Hu Feng, The School of Rare Earth, Inner Mongolia University of Science and Technology, Arding Street No. 7, Baotou 014010, P. R. China, Tel.: +86 04728313119, Fax: +86 04728313119, E-mail:

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Received: 2013-03-02
Accepted: 2013-07-17
Published Online: 2014-01-11
Published in Print: 2014-01-09

© 2014, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110989
Keywords for this article
Amorphous and nanocrystalline; Hydrogenation and dehydrogenation kinetics; Hydrogen diffusion coefficients; Hydrogen absorption and desorption ratios

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Microwave absorbing materials based on polyaniline composites: a review
  5. Atomic mobilities in fcc Cu–Mn–Ni–Zn alloys and their characterizations of uphill diffusion and zero-flux plane phenomena
  6. Synthesis and characterization of nanocristalline Fe-40 at.% Si alloy prepared by high energy ball milling
  7. An investigation of the microstructure and hydrogenation/dehydrogenation properties of ball-milled CeMg12 alloys with Ni powders
  8. Nanoscratch characterization of indium nitride films
  9. Role of axial thrust in the formation of microstructure and fracture surface of the weld zone in friction stir welded AA6063 aluminium alloy
  10. Microstructures and corrosion resistance of three typical superlight Mg–Li alloys
  11. The effect of magnetron-deposited Al2O3 coating on the corrosion resistance of Ti–Al alloys in a 9 %O2 + 0.2 %HCl + 0.08 %SO2 + N2 atmosphere
  12. Homogenization of direct chill cast AlSi1MgMn billets
  13. Effect of rare earth Y addition on two-phase Ni53Mn22Co6Ga19 high-temperature shape memory alloy
  14. Thermal treatment induced transition from Zn3(OH)2(BDC)2 (MOF-69c) to Zn4O(BDC)3 (MOF-5)
  15. Thermal investigation of alumina-based pastes and refractory mixturesd
  16. Short Communications
  17. One-step magnetic modification of non-magnetic solid materials
  18. DGM News
  19. DGM News
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