Improvement of hydrogen absorption performances of mechanically alloyed Mg2Ni powders by water cooling

Chin Yi Chen, Shian Ke Lin, Chung Kwei Lin

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In the present study, Mg2Ni intermetallic powders were prepared by mechanical alloying from elemental magnesium and nickel under an Ar atmosphere with or without water cooling treatments. Two different cooling temperature ranges were used to modify the hydrogen absorption properties of the intermetallic Mg2Ni. The powders milled with or without water cooling were examined as a function of milling time by X-ray diffractometry. Then the hydrogen absorption performance of the 15 h as-milled powders were evaluated. The experimental results show that all the as-milled Mg2Ni powders exhibited a mixture of Mg2Ni, magnesium and nickel solid solutions. The maximum hydrogen absorption content of 15 h as-milled Mg 2Ni powders was increased from 3.14 mass% to 3.83 mass% by cooling treatment in a temperature range of 264-267 K. The reversible hydrogenation content was also increased from 2.40 mass% to 3.03 mass% in the same cooling temperature range. More than 20% improvement of hydrogen absorption for Mg 2Ni intermetallic powders was achieved by water cooling treatment.

Original languageEnglish
Pages (from-to)842-846
Number of pages5
JournalMaterials Transactions
Volume48
Issue number4
DOIs
Publication statusPublished - Apr 2007
Externally publishedYes

Keywords

  • Hydrogen storage
  • Intermetallics
  • Mechanical alloying
  • MgNi
  • Water cooling

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

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