High-pressure synthesis of hydrides of Ca-TM systems (TM = Mn, Fe, Co and Ni)

H. Kakuta, T. Miyashita, Y. Goto, Atsunori Kamegawa, H. Takamura, M. Okada

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

New hydrides of Ca-TM-H systems (TM = Mn, Fe, Co and Ni) have been explored by using a high-pressure technique. The high-pressure of up to 5 GPa was yielded by cubic-anvil-type apparatus. All the samples of Ca-TM-H systems (TM = Mn, Fe and Co) prepared at 1073 K under 5 GPa were found to be mixtures of the raw materials. However, for the Ca-Ni-H system, a new hydride with a chemical composition of CaH2-33 at%Ni was prepared at 1223 K under 5 GPa. The color of the hydride was reddish brown. As an additional hydrogen source was used during the synthesis, the color changed into black. The new hydride prepared with additional hydrogen was found to have the CsCl-type structure. The lattice parameter was a = 0.35542(2) nm.

Original languageEnglish
Pages (from-to)443-445
Number of pages3
JournalMaterials Transactions
Volume42
Issue number3
DOIs
Publication statusPublished - 2001 Jan 1

Keywords

  • Anvil-type apparatus
  • Calcium-transition metal-hydrogen systems
  • CsCl-type structure
  • X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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