New-Mg–Mn–Ni-alloys-as-efficient-hydrogen-storage-materials.pdf

Intermetallics 18 (2010) 1579e1585 Contents lists available at ScienceDirect Intermetallics journal homepage: www.elsevi /locate/intermet New MgeMneNi alloys as efficient hydrogen storage materials R.V. Denys a, I. Yu Zavaliy a, *, V. Paul-Boncour b, V.V. Berezovets a, I.V. Koval’chuk a, A.B. Riabov a a Physico-Mechanical Institute, NAS Ukraine, 5, Naukova St., Lviv 79601, Ukraine b ICMPE, CNRS, 2-8 rue Henri Dunant, 94320 Thiais Cedex, France a r t i c l e i n f o a b s t r a c t Article history: New ternary MgeMneNi alloys synthesised by high energy ball milling have been studied as hydrogen Received 30 July 2009 storage materials. A new Mg MnNi ternary intermetallic compound of the Ti Ni type has been iden- 3 2 2 Received in revised form tified, its structure was studied by neutron diffraction. It has been shown that in the MgeMneNi system 9 April 2010 this intermetallic coexists with Mg, forming two-phase MgeMg MnNi alloys. The Mg MnNi compound 3 2 3 2 Accepted 18 April 2010 reversibly absorbs about 1 wt.% of hydrogen already at room temperature and forms interstitial type Available online 10 May 2010