Paper Title:
Hydrogen-Induced Amorphization in C15 Laves Phase DyCo2 Studied by Pressure Calorimetry
  Abstract

Structural changes in C15 Laves phase DyCo2 on heating using a pressure differential scanning calorimeter (PDSC) in a hydrogen atmosphere between 0.1 and 5.0 MPa were investigated by a powder X-ray diffractometer (XRD), a differential scanning calorimeter under an argon flow atmosphere (Ar-DSC), a transmission electron microscope (TEM) and a hydrogen analyzer. As the temperature of DyCo2 increases, the reactions such as hydrogen absorption in a crystalline state, HIA (hydrogen-induced amorphization), precipitation of DyH3 and decomposition of the remaining amorphous phase into β-Co + DyH3 occurred exothermically for every hydrogen pressure. The mechanism of HIA in DyCo2 is discussed on the basis of the experimental results.

  Info
Periodical
Materials Science Forum (Volumes 475-479)
Main Theme
Edited by
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
Pages
2469-2472
DOI
10.4028/www.scientific.net/MSF.475-479.2469
Citation
H.-W. Li, K. Ishikawa, K. Aoki, "Hydrogen-Induced Amorphization in C15 Laves Phase DyCo2 Studied by Pressure Calorimetry", Materials Science Forum, Vols. 475-479, pp. 2469-2472, 2005
Online since
January 2005
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