High-temperature X-ray study of the cubic-tetragonal diffusionless phase transition in the ZrO[sub 2]-ErO[sub 1. 5] system: I, phase change between two forms of a tetragonal phase, t[prime]-ZrO[sub 2] and t[double prime]-ZrO[sub 2], in the compositionally homogeneous 14 mol% ErO[sub 1. 5]-ZrO[sub 2]
- Tokyo Inst. of Tech., Yokohama (Japan). Research Lab. of Engineering Materials
The cubic-tetragonal phase transition of 14 mol% ErO[sub 1.5]-ZrO[sub 2] was investigated through high-temperature powder X-ray diffraction. A new tetragonal form without tetragonality, t[double prime]-ZrO[sub 2], was taken into consideration, although only two forms of t- and t[prime]-ZrO[sub 2] have previously been distinguished. The metastable t[double prime]-ZrO[sub 2], which could be obtained by rapid quenching of 14 mol% ErO[sub 1.5]-ZrO[sub 2] melts, partially changed into t[prime]-ZrO[sub 2] through a thermal activation process above 500C. The t[prime]-ZrO[sub 2] continuously changed into t[double prime]-ZrO[sub 2] or transformed into cubic phase at about 1,200C. The t[prime]-t[double prime] change occurred reversibly below 1,100C.
- OSTI ID:
- 6239152
- Journal Information:
- Journal of the American Ceramic Society; (United States), Vol. 76:3; ISSN 0002-7820
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ERBIUM OXIDES
CRYSTAL-PHASE TRANSFORMATIONS
ZIRCONIUM OXIDES
CRYSTAL STRUCTURE
CUBIC LATTICES
EXPERIMENTAL DATA
PHASE STUDIES
POWDERS
QUENCHING
SAMPLE PREPARATION
TEMPERATURE RANGE 1000-4000 K
TETRAGONAL LATTICES
X-RAY DIFFRACTION
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL LATTICES
DATA
DIFFRACTION
ERBIUM COMPOUNDS
INFORMATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
RARE EARTH COMPOUNDS
SCATTERING
TEMPERATURE RANGE
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies