Phase Transformations in Monoclinic Zirconia Caused by Milling and Subsequent Annealing

Monoclinic ZrO2 has been milled for various times down to a crystallite size of 145 Å. Using the time‐differential perturbed‐angular‐correlation technique, it was possible to associate the resulting growing amount of disordered material with two different, very distributed and milling‐time‐dependent...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 1994-06, Vol.77 (6), p.1525-1530
Main Authors: Scian, Alberto N., Aglietti, Esteban F., Caracoche, María C., Rivas, Patricia C., Pasquevich, Alberto F., López García, Alberto R.
Format: Article
Language:English
Subjects:
360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies
ANNEALING
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
CHALCOGENIDES
Chemical industry and chemicals
CRYSTAL-PHASE TRANSFORMATIONS
DATA
Exact sciences and technology
EXPERIMENTAL DATA
HEAT TREATMENTS
INFORMATION
MACHINING
MATERIALS SCIENCE
MILLING
Miscellaneous
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
Technical ceramics
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES
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Summary:Monoclinic ZrO2 has been milled for various times down to a crystallite size of 145 Å. Using the time‐differential perturbed‐angular‐correlation technique, it was possible to associate the resulting growing amount of disordered material with two different, very distributed and milling‐time‐dependent hyperfine interactions: one (Y) of quadrupole frequency similar to that of tetragonal zirconia after long milling, the other (X) one of a quadrupole frequency similar to that of monoclinic zirconia at shorter milling times. Upon annealing, all samples showed the recovery of the crystalline monoclinic phase at the expense of the disordered structures. In samples milled for shorter times, the (Y) interaction emerges as an ordered crystallization product, upon annealing at temperatures which depend nearly linearly on the crystallite size.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1994.tb09752.x