Migration of intergranular boundaries in cubic zirconia-yttria induced by magnesia addition

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb05268.x· OSTI ID:5900937

Jeong, J W; Yoon, D N ^[1]; Kim, D Y ^[2]

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1. Korea Advanced Inst. of Science, Seoul (Republic of Korea). Dept. of Materials Science
2. Department of Inorganic Materials Engineering, College of Engineering, Seoul National University (KR)

When partially sintered cubic Zr-O{sub 2}-10 mol% Y{sub 2}O{sub 3} specimens are heat-treated at 1500{degrees}C with 5MgO {center dot} 95(ZrO{sub 2}-10 mol% Y{sub 2}O{sub 3}) powder mixture in the pores, the intergranular boundaries, which may be either grain boundaries or thin glass films, migrate, leaving behind them a new solid solution slightly enriched with MgO but depleted of Y{sub 2}O{sub 3}. The boundary curvatures generally increase during the migration and the average migration distance initially increases linearly with the heat treatment time. The observed boundary migration behavior is similar to that observed previously in a number of metallic systems, and its driving force is believed to arise from the coherency strain in the thin solute diffusion zone ahead of the moving boundaries.

• OSTI ID: 5900937
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Journal Issue: 7 Vol. 73:7; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ALLOYS
CHALCOGENIDES
CRYSTAL STRUCTURE
DIFFUSION
DISPERSIONS
FILMS
GLASS
GRAIN BOUNDARIES
HEAT TREATMENTS
MAGNESIUM ADDITIONS
MAGNESIUM ALLOYS
MICROSTRUCTURE
MIXTURES
OXIDES
OXYGEN COMPOUNDS
POWDERS
SOLUTES
THIN FILMS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES