Hydrogen absorption performance of mechanically alloyed (Mg 2Ni)100-xTix powder

Chin Yi Chen, Chun Kai Wang, Pee Yew Lee, Chung Kwei Lin

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The hydrogen storage alloy (Mg2Ni)100-xTix (x = 0, 2.5, 5.0, 7.5 and 10.0at%) powders were synthesized from elemental powder mixture by mechanical alloying (MA) under an Ar atmosphere. The as-milled powders were examined as a function of titanium addition by X-ray diffraction and synchrotron X-ray absorption near-edge structure (XANES) techniques at various milling time. The hydrogen absorption kinetics of the 15 h as-milled powders were evaluated. The maximum hydrogen absorption content of 15 h as-milled Mg2Ni powders can be improved from 3.14mass% to 3.88mass% when 5.0at% of titanium was added. The hydrogenation rate of the Mg 2Ni powder was also obviously enhanced by introducing the titanium into Mg2Ni lattices. More than 20% improvement of hydrogen absorption for Mg2Ni intermetallic powders was achieved by adding titanium.

Original languageEnglish
Pages (from-to)3170-3175
Number of pages6
JournalMaterials Transactions
Volume48
Issue number12
DOIs
Publication statusPublished - Dec 2007
Externally publishedYes

Keywords

  • Alloying
  • Hydrogen storage
  • Intermetallics
  • Mechanical alloying
  • Mg ni, titanium
  • X-ray absorption near-edge structure (XANES)

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

Fingerprint Dive into the research topics of 'Hydrogen absorption performance of mechanically alloyed (Mg 2Ni)100-xTix powder'. Together they form a unique fingerprint.

  • Cite this