Microstructure and phase stability of yttria-doped tetragonal zirconia polycrystals heat treated in nitrogen atmosphere

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1997.tb03163.x· OSTI ID:549930

Chung, T J; Kim, D Y ^[1]; Song, H; Kim, G H ^[2]

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1. Seoul National Univ. (Korea, Republic of). Dept. of Inorganic Materials Engineering
2. Korea Inst. of Science and Technology, Seoul (Korea, Republic of). Ceramic Processing Center

The low-temperature degradation of zirconia (ZrO{sub 2}) that was doped with 3 mol% yttria (Y{sub 2}O{sub 3}) (3Y-TZP) was presented by the heat treatment of sintered specimens in nitrogen. The heat treatment of sintered specimens resulted in a surface layer that was stabilized by nitrogen ions, whereas the interior was only slightly affected by the heat treatment. X-ray diffractometry and transmission electron microscopy analyses revealed that the stabilized surface layer consisted of cubic grains with tetragonal precipitates. Although the presence of the surface layer decreased the strength of the sintered 3Y-TZP, the strength of nitrified specimens was maintained when low-temperature annealing was applied.

• Sponsoring Organization: USDOE
• OSTI ID: 549930
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 10 Vol. 80; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL-PHASE TRANSFORMATIONS
CUBIC LATTICES
HEAT TREATMENTS
MICROSTRUCTURE
NITROGEN
SURFACES
TETRAGONAL LATTICES
X-RAY DIFFRACTION
YTTRIUM OXIDES
ZIRCONIUM OXIDES