Phase formation and hydrogen ordering in yttrium-hydrogen system

Ke Wang, Jason R. Hattrick-Simpers, Leonid A. Bendersky

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Phase transformations in epitaxial yttrium films grown on (0001) TI//(0001)AL2O3 Ti-buffered sapphire substrates and hydrogenated for 10 min were characterized using transmission electron microscopy. After hydrogen charging, dense twin lamellae form during a(Y(H))-to-β(YH2) phase transition with twin boundaries predominately parallel to the interface between Y and a substrate. High densities of Shockley partial dislocations are present at the twin boundaries, their glides during phase transformation are responsible for the formation of twin lamellae. Electron diffraction from YH2 phase shows superlattice reflections, which suggests a new type of ordering on octahedral interstitial sites.

Original languageEnglish (US)
Title of host publicationHydrogen Storage Materials
Number of pages6
StatePublished - 2010
Event2009 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 30 2009Dec 4 2009

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2009 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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