Microstructural evolution and improved hydrogenation–dehydrogenation kinetics of nanostructured melt-spun Mg–Ni–Mm alloys
作者： Y. Wu , M.V. Lototsky , J.K. Solberg , V.A. Yartys
DOI: 10.1016/J.JALLCOM.2010.11.140
关键词:
摘要: The microstructural evolution of as-quenched ribbons and ball-milled hydrides the Mg-10Ni-2Mm alloy was studied by TEM. These studies showed a refinement microstructures during applied processing nucleation MmMg(12) intermetallic at grain boundaries Mg Mg(2)Ni. interface between Mg(2)Ni is semi-coherent, with an ordered repetition consistent atomic arrangements. kinetics H-absorption/ desorption improved due to fast hydrogen diffusion in nanograins, thus, providing paths for H-exchange. TEM (a) stability nano-sized grains Cu-1000 (the surface velocity copper wheel: 1000 rpm) sample that underwent cycling absorption heating 350 degrees C; (b) formation MmH(3-x) hydride from its preferential location MgH(2). Clearly, Mg(2)NiH(4) act as centres initiate MgH(2), promoting alloys. Pressure-composition-temperature diagrams show presence two plateaux, Mg-MgH(2) Mg(2)Ni-Mg(2)NiH(4). MgH(2) plateau no hysteresis practically slope, while exhibited both pronounced particularly nanocrystalline sample. maximum storage capacity higher than microcrystalline one. (C) 2010 Elsevier B. V. All rights reserved.
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sci-hub.se 参考文章(12)
S. Orimo, H. Fujii, K. Ikeda, Notable hydriding properties of a nanostructured composite material of the Mg2Ni-H system synthesized by reactive mechanical grinding Acta Materialia. ,vol. 45, pp. 331- 341 ,(1997) , 10.1016/S1359-6454(96)00158-9
J-L Bobet, B Chevalier, M.Y Song, B Darriet, J Etourneau, Hydrogen sorption of Mg-based mixtures elaborated by reactive mechanical grinding Journal of Alloys and Compounds. ,vol. 336, pp. 292- 296 ,(2002) , 10.1016/S0925-8388(01)01883-7
Ying Wu, Jan Ketil Solberg, Volodymyr A Yartys, The effect of solidification rate on microstructural evolution of a melt-spun Mg–20Ni–8Mm hydrogen storage alloy Journal of Alloys and Compounds. ,vol. 446, pp. 178- 182 ,(2007) , 10.1016/J.JALLCOM.2006.12.002
R. Janot, F. Cuevas, M. Latroche, A. Percheron-Guégan, Influence of crystallinity on the structural and hydrogenation properties of Mg2X phases (X=Ni, Si, Ge, Sn) Intermetallics. ,vol. 14, pp. 163- 169 ,(2006) , 10.1016/J.INTERMET.2005.05.003
R.V. Denys, A.B. Riabov, J.P. Maehlen, M.V. Lototsky, J.K. Solberg, V.A. Yartys, In situ synchrotron X-ray diffraction studies of hydrogen desorption and absorption properties of Mg and Mg–Mm–Ni after reactive ball milling in hydrogen Acta Materialia. ,vol. 57, pp. 3989- 4000 ,(2009) , 10.1016/J.ACTAMAT.2009.05.004
Shin-Ichi Yamaura, Keita Isogai, Hisamichi Kimura, Akihisa Inoue, Electrochemical and Thermal Properties of Hydrogen-absorbed Mg 67 Ni 28 Pd 5 Amorphous Alloy Journal of Materials Research. ,vol. 17, pp. 60- 64 ,(2002) , 10.1557/JMR.2002.0011
S. Yamamoto, Y. Fukai, E. Rönnebro, J. Chen, T. Sakai, Structural changes of Mg2NiH4 under high hydrogen pressures Journal of Alloys and Compounds. ,vol. 356, pp. 697- 700 ,(2003) , 10.1016/S0925-8388(03)00174-9
Y. Wu, M.V. Lototsky, J.K. Solberg, V.A. Yartys, W. Han, S.X. Zhou, Microstructure and novel hydrogen storage properties of melt-spun Mg–Ni–Mm alloys Journal of Alloys and Compounds. ,vol. 477, pp. 262- 266 ,(2009) , 10.1016/J.JALLCOM.2008.10.122
Roman V. Denys, Andrey A. Poletaev, Jan Ketil Solberg, Boris P. Tarasov, Volodymyr A. Yartys, LaMg11 with a giant unit cell synthesized by hydrogen metallurgy: Crystal structure and hydrogenation behavior Acta Materialia. ,vol. 58, pp. 2510- 2519 ,(2010) , 10.1016/J.ACTAMAT.2009.12.037
Bjørn Vigeholm, John Kjøller, Bent Larsen, Magnesium for hydrogen storage Journal of The Less Common Metals. ,vol. 74, pp. 341- 350 ,(1980) , 10.1016/0022-5088(80)90172-1