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

Abstract

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
Pages13-18
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
Volume1216
ISSN (Print)0272-9172

Other

Other2009 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period11/30/0912/4/09

All Science Journal Classification (ASJC) codes

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

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