ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Tetragonal compact bodies obtained by quenching from the melt a ZrO2–2.8 mol% Y2O3 commercial powder have been investigated between room temperature and 1150°C, using mainly perturbed angular correlations spectroscopy. The resulting nontransformable t′ phase observed by optical micrography is characterized at nanoscopic level by a hyperfine interaction describing defective and disordered Zr4+ neighborhoods very different from those of the regular tetragonal phase. A small amount of remaining Zr4+ sites corresponds to a scarcely distorted tetragonal structure. As the compacts are heated, two processes activate: the movement of vacancies and the gradual and irreversible conversion of t′ defective sites into less defective ones, probably resulting from oxygen absorption.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1151-2916.2001.tb00629.x
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