The new ternary intermetallic NdNiMg5: Hydrogen sorption properties and more

Bassem Ourane, Etienne Gaudin, Yong Feng Lu, Ridha Zouari, Abdelhamid Ben Salah, Jean Louis Bobet

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The hydrogen sorption properties of the new compound NdNiMg5 have been investigated. The compound starts to absorb hydrogen at 573 K under a pressure of 1 MPa. The absorption leads to the decomposition into two binary hydrides MgH2 and NdH2.6, and a ternary hydride Mg2NiH4. The maximum hydrogen sorption capacity reached is 3.2 wt.% and the cycling properties of the mixture decreases quickly due to grain growth. The activation energies for absorption and desorption are estimated to be equal to 14(3) kJ/mol H2 and 110(9) kJ/mol H2, respectively. Preliminary studies of the mechanical properties were also performed. Despite the high content in magnesium, NdNiMg5 exhibits an average microhardness of 210 Hv and a reduced Young Modulus of 9(1) GPa.

Original languageEnglish (US)
Pages (from-to)275-279
Number of pages5
JournalMaterials Research Bulletin
Volume61
DOIs
StatePublished - Jan 2015

Fingerprint

sorption
Intermetallics
intermetallics
Sorption
Hydrogen
Hydrides
hydrides
hydrogen
Grain growth
Microhardness
microhardness
Magnesium
magnesium
Desorption
modulus of elasticity
Activation energy
Elastic moduli
desorption
mechanical properties
activation energy

Keywords

  • A. Inorganic compounds
  • C. Electron microscopy
  • D. Crystal structure
  • D. Energy storage

ASJC Scopus subject areas

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

Cite this

The new ternary intermetallic NdNiMg5 : Hydrogen sorption properties and more. / Ourane, Bassem; Gaudin, Etienne; Lu, Yong Feng; Zouari, Ridha; Salah, Abdelhamid Ben; Bobet, Jean Louis.

In: Materials Research Bulletin, Vol. 61, 01.2015, p. 275-279.

Research output: Contribution to journalArticle

Ourane, Bassem ; Gaudin, Etienne ; Lu, Yong Feng ; Zouari, Ridha ; Salah, Abdelhamid Ben ; Bobet, Jean Louis. / The new ternary intermetallic NdNiMg5 : Hydrogen sorption properties and more. In: Materials Research Bulletin. 2015 ; Vol. 61. pp. 275-279.
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