Hydrogen pressure dependence of structural changes in C15 Laves phase DyMn 2 studied by pressure differential scanning calorimetry

H. W. Li, K. Ishikawa, K. Aoki

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

C15 Laves phase DyMn 2 was thermally analyzed using a pressure differential scanning calorimeter (PDSC) in a hydrogen atmosphere between 0.1 and 5.0 MPa and its structural changes were investigated with a powder X-ray diffraction (XRD), a conventional differential scanning calorimeter in an argon atmosphere (Ar-DSC), a transmission electron microscope (TEM) and a hydrogen analyzer. Three exothermic peaks of (1) hydrogen absorption forming a crystalline (c-) and an amorphous (a-) hydride DyMn 2H x; (2) the simultaneous occurrence of hydrogen-induced amorphization (HIA) and the precipitation of DyH 3 and (3) the decomposition of the amorphous hydride into DyH 3 + α-Mn were observed independent of the hydrogen pressure. The peak temperature T p for all reactions showed a negative pressure dependence, and no single-phase c- and a-DyMn 2H x were obtained under the present experimental conditions.

本文言語英語
ページ(範囲)86-91
ページ数6
ジャーナルJournal of Alloys and Compounds
399
1-2
DOI
出版ステータス出版済み - 8 16 2005
外部発表はい

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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