PRECIPITATION PHENOMENA IN NIOBIUM-DOPED TUNGSTEN TRIOXIDE.

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

PRECIPITATION PHENOMENA IN NIOBIUM-DOPED TUNGSTEN TRIOXIDE.

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

Research output: Contribution to journal › Article › peer-review

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 language	English (US)
Pages (from-to)	227-237
Number of pages	11
Journal	Proceedings of The Royal Society of London, Series A: Mathematical and Physical Sciences
Volume	415
Issue number	1848
State	Published - Jan 8 1988
Externally published	Yes

ASJC Scopus subject areas

General Engineering

Cite this

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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.",

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AU - Bursill, L. A.

AU - Smith, D. J.

AU - Evans, Rhonda G.

PY - 1988/1/8

Y1 - 1988/1/8

N2 - 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.

AB - 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.

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SN - 0080-4630

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JO - Proceedings of The Royal Society of London, Series A: Mathematical and Physical Sciences

JF - Proceedings of The Royal Society of London, Series A: Mathematical and Physical Sciences

IS - 1848

ER -

PRECIPITATION PHENOMENA IN NIOBIUM-DOPED TUNGSTEN TRIOXIDE.

Abstract

ASJC Scopus subject areas

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