Evaluations of Microstructure and Hydrogenation Properties on $Mg_2NiH_x$

$Mg_2NiH_x$ 수소저장합금의 미세결정구조 및 수소화 특성평가

  • Seok, Song (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials (ReSEM), Chungju National University) ;
  • Shin, Kyung (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials (ReSEM), Chungju National University) ;
  • Kweon, Soon-Yong (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials (ReSEM), Chungju National University) ;
  • Ur, Soon-Chul (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials (ReSEM), Chungju National University) ;
  • Lee, Young-Geun (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials (ReSEM), Chungju National University) ;
  • Hong, Tae-Whan (Department of Materials Science and Engineering/Research Center for Sustainable ECo-Devices and Materials (ReSEM), Chungju National University)
  • 석송 (충주대학교 신소재공학과/친환경 에너지 변환.저장소재 및 부품개발 연구센터) ;
  • 신경 (충주대학교 신소재공학과/친환경 에너지 변환.저장소재 및 부품개발 연구센터) ;
  • 권순용 (충주대학교 신소재공학과/친환경 에너지 변환.저장소재 및 부품개발 연구센터) ;
  • 어순철 (충주대학교 신소재공학과/친환경 에너지 변환.저장소재 및 부품개발 연구센터) ;
  • 이영근 (충주대학교 신소재공학과/친환경 에너지 변환.저장소재 및 부품개발 연구센터) ;
  • 홍태환 (충주대학교 신소재공학과/친환경 에너지 변환.저장소재 및 부품개발 연구센터)
  • Published : 2005.09.15

Abstract

Mg and Mg-based alloys are most important hydrogen storage materials. It is a lightweight and low-cost materials with high hydrogen storage capacity. However, the formation of hydride at high temperature, the deterioration effect, the hydriding and dehydriding kinetics are bad factor for application. In this study, Mg and Ni have been produced by hydrogen induced mechanical alloying(HIMA) process. The raw materials, Mg(purity 99.9%) chip and Ni(purity 99.95%) chip was prepared by using a planetary ball mill apparatus(FRITSCH pulverisette 5). The balls to chips mass ratio(BCR) are 30:1. The hydrogen pressure induced 2.0MPa and milling times were 12, 24, 48, 72, 96 hours with a rotating speed of 200rpm. X-ray diffraction(XRD) analysis was made to characterize the crystallite size and misfit strain. The crystallite size measured by laser particle size analysis(PSA). Microstructure changes were investigated by scanning electron microscopy(SEM) and the transmission electron microscopy(TEM). The hydrogen storage properties were evaluated by using an Sivert's type automatic pressure-composition-therm(PCT) apparatus.

References

  1. Ming Au, Mater. Sci. and Eng. B. Vol. 117, 2005, pp. 37-44 https://doi.org/10.1016/j.mseb.2004.10.017
  2. H. Fujii, S. Orimo, K. Ikeda, J. Alloys and Comp. Vol. 80, 1997, pp. 253-254
  3. J. Huot, J.F. Pelletier, G. Liang, M. Sutton, R. Schulz, J. Alloys and Comp. Vol. 727-731, 2002, pp. 330-332
  4. L. Zaluski, A. Zaluska, J.O. Strom-Olsen, J. Alloys and Comp. Vol. 70, 1995, pp. 253-254
  5. 강병하, 김미선, 김영직, 김종원, 남기석, 남석우, 백영순, 심규성, 윤왕래, 이병권, 조용희, 이태규, 임태훈, 조원일, 홍태환 : 수소에너지기술, 에너지관리공단 수소에너지연구회, 2001
  6. G. Liang, S. Boily, J. Huot, A. Van Neste, R. Sohulz, J. Alloys and Comp. Vol. 302, 1998, p. 267
  7. J.I. Langford, A.J.C. Wilson : Scherrer after Sixty Years : 'A Survey and Some New Results in the Determination of Crystallite Size', J. Applied Crystallography, Vol. 11, 1978, pp. 102-113 https://doi.org/10.1107/S0021889878012844
  8. G.K. Williamson and W.H. Hall : Acta Metall., Vol. 1, 1953, p. 22 https://doi.org/10.1016/0001-6160(53)90006-6
  9. R.W. Cheary, James P. Cline : 'An Analysis of the Effect of Different Instrumental Conditions on the Shapes of X-ray Powder Line Profiles', Advanceds in X-ray Analysis, Vol. 38, 1995, pp. 75-82
  10. J.I. Langford : 'Some Application of Peak Shape and Resolution in Diffractometry with Monochromatic X-rays', J. Applied Crystallography, Vol. 21, 1988, pp. 430-437 https://doi.org/10.1107/S002188988800411X