Cation interdiffusion in polycrystalline cubic C-type ytria-zirconia-hafnia solid solutions

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1989.tb06042.x· OSTI ID:6954610

Sakka, Y; Oishi, Y; Ando, K; Masuda, M ^[1]

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1. Dept. of Nuclear Engineering, Kyushu Univ. Hakozaki, Fukuoka 812 (JP)

Cation interdiffusion in cubic C-type solid solutions was investigated for the polycrystalline systems Y{sub 2}O{sub 3} {minus} Zr{sub x}Hf{sub 1 {minus} x}O{sub 2} and Y{sub 2}O{sub 3} {minus} ZrO{sub 2} in the small-grain, deep-penetration conditions at 1615{degrees} to 1822{degrees}C. Lattice and grain-boundary diffusion parameters were calculated from cation concentration distributions by using Oishi and Ichimura's grain-boundary diffusion equation. The results indicate that Zr {minus} Y and Zr {minus} Hf interdiffusion coefficients decreased with an increase in Y content. The cation diffusivities were lower in the C-type cubic than in fluorite-type cubic solid solutions. The results are compared with diffusivities in other C-type cubic oxides.

• OSTI ID: 6954610
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 72:11; 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
ANIONS
ATOM TRANSPORT
CATIONS
CHALCOGENIDES
CHARGED PARTICLES
CRYSTAL STRUCTURE
CRYSTALS
DIFFUSION
DISPERSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
GRAIN BOUNDARIES
HAFNIUM COMPOUNDS
HAFNIUM OXIDES
IONIC CONDUCTIVITY
IONS
LATTICE PARAMETERS
MICROSTRUCTURE
MIXTURES
NEUTRAL-PARTICLE TRANSPORT
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYCRYSTALS
RADIATION TRANSPORT
REFRACTORY METAL COMPOUNDS
SOLID SOLUTIONS
SOLUTIONS
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES