Embrittlement and the bistable crystal structure of zirconium hydride

GJ Ackland*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The stability of the epsilon phase of zirconium hydride is studied using the pseudopotential plane wave method. The fluorite structure is mechanically unstable with respect to a tetragonal distortion. However, the minimum corresponding to c > a is almost degenerate in energy with that for c <a. The distortion explains the uniaxial misfit strain responsible for delayed hydride cracking in zirconium alloys.

Original languageEnglish
Pages (from-to)2233-2236
Number of pages4
JournalPhysical Review Letters
Volume80
Issue number10
DOIs
Publication statusPublished - 9 Mar 1998

Keywords

  • PSEUDOPOTENTIALS
  • GROWTH
  • ALLOYS
  • STATE
  • GAS

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