Loading...

Synthesis of a nanostructured MgH2–Ti alloy composite for hydrogen storage via combined vacuum arc remelting and mechanical alloying [electronic resource]

Mahmoudi, N ; Sharif University of Technology

508 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.matlet.2011.01.036
  3. Abstract:
  4. To improve the hydrogen kinetics of magnesium hydride, TiCr1.2Fe0.6 alloy was prepared by vacuum arc remelting (VAR) and the alloy was co-milled with MgH2 to process nanostructured MgH2–5 at.% TiCr1.2Fe0.6 powder. The hydrogen desorption properties of the composite powder were studied and compared with pure magnesium hydride. X-ray diffraction (XRD) analysis showed that the composite powder prepared by VAR/mechanical alloying (MA) procedure consisted of β-MgH2, γ-MgH2, bcc Ti–Cr–Fe alloy, and small amount of MgO. The average size of particles and their grain structure after 4 h MA were determined by a laser particle size analyzer and XRD method and found to be 194 nm and 11 nm, respectively. The hydrogen desorption temperature of magnesium hydride decreased from 426 °C to 235 °C by the bcc Ti alloy and the utilized processing method, i.e. combined VAR/MA
  5. Keywords:
  6. Composite materials ; Intermetallic alloys and compounds ; Magnesium hydride ; Dehydrogenation
  7. Source: Journal of Materials Letters ; 15 April 2011, Volume 65, Issue 7, Pages 1120–1122
  8. URL: http://www.sciencedirect.com/science/article/pii/S0167577X11000577