Abstract
Structural changes of C15 Laves RFe 2 (R=Y, Ce, Sm, Gd, Tb, Dy, Ho and Er) compounds during thermal analysis in an H 2 atmosphere were investigated by scanning differential calorimetry (DSC), powder X-ray diffraction (XRD) and hydrogen analysis. Hydrogen absorption, hydrogen-induced amorphization (HIA), precipitation of RH 2 and crystallization of an amorphous phase occurred with increasing temperature for R=Y, Sm, Gd, Tb, Dy and Ho. Hydrogen absorption and HIA occurred simultaneously for R=Ce, while HIA and precipitation of ErH 2 occurred simultaneously for R=Er. The enthalpy change ΔH and the activation energy ΔE for thermal reactions of RFe 2 during heating in a hydrogen atmosphere were evaluated by DSC.
| Original language | English |
|---|---|
| Pages (from-to) | 743-746 |
| Number of pages | 4 |
| Journal | Journal of Alloys and Compounds |
| Volume | 330-332 |
| DOIs | |
| Publication status | Published - 17 Jan 2002 |
| Externally published | Yes |
| Event | Proceedings of the International Symposium on Metal-Hydrogen (MH 2000) - Noosa Heads, QLD, Australia Duration: 1 Oct 2000 → 6 Oct 2000 |
Keywords
- Activation energy
- Amorphous
- C15 Laves phase
- Hydrogen
- Rare earth metal