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]

Journal Article · Sun Feb 28 23:00:00 EST 1993 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1993.tb03654.x· OSTI ID:6239152

Yashima, Masatomo; Ishizawa, Nobuo; Yoshimura, Masahiro ^[1]

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1. 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), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 76:3; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CUBIC LATTICES
DATA
DIFFRACTION
ERBIUM COMPOUNDS
ERBIUM OXIDES
EXPERIMENTAL DATA
INFORMATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHASE TRANSFORMATIONS
POWDERS
QUENCHING
RARE EARTH COMPOUNDS
SAMPLE PREPARATION
SCATTERING
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES