PRECIPITATION PHENOMENA IN NIOBIUM-DOPED TUNGSTEN TRIOXIDE.

L. A. Bursill, D. J. Smith, Rhonda G. Evans

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

High-resolution electron microscopy (HREM) images of niobium-doped tungsten trioxide show small spot contrasts and walls of apparently empty sites, in addition to a fascinating range of extended defects involving crystallographic shear, pentagonal column and combination precipitation phenomena. The precipitation of crystallographic shear defects in situ and the appearance of metal-rich surface layers are described. Computer simulations of pentagonal columns and of small-defect contrast are used to test the validity of oxygen-vacancy and interstitial-defect models, and to support the interpretation of more complex defect structures.

Original languageEnglish (US)
Pages (from-to)227-237
Number of pages11
JournalProceedings of The Royal Society of London, Series A: Mathematical and Physical Sciences
Volume415
Issue number1848
StatePublished - Jan 8 1988
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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