Pro- and subeutectoid behavior of the tetragonal phase in magnesia-partially-stabilized zirconia

Journal Article · Fri Jan 31 23:00:00 EST 1992 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1992.tb08202.x· OSTI ID:5427027

Montross, C S ^[1]

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1. Dept. of Mining and Metallurgical Engineering and Electron Microscope Center, Univ. of Queensland, Queensland 4072 (AU)

Magnesia-partially-stabilized zirconia (Mg-PSZ) is industrially important because of transformable metastable tetragonal precipitates which interact with the arrest cracks. This work addresses the precipitation of tetragonal phases at one composition, 9.5 mol% MgO, throughout a range of temperatures. High-purity zirconia samples were sintered at 1700{degrees}C and rapidly quenched to heat-treatment temperatures ranging from 1600{degrees} to 1100{degrees}C, then quenched to room temperature. Cooling rates through the tetragonal + MgO and the monoclinic + MgO two-phase regions were found to affect the phase content. In this paper the kinetics of nonequilibrium phase transformation for high-purity Mg-PSZ are presented in term of time-temperature-transformation diagrams.

• OSTI ID: 5427027
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 75:2; ISSN 0002-7820; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIAGRAMS
ENERGY LEVELS
EXCITED STATES
FABRICATION
HEAT TREATMENTS
KINETICS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS WORKING
METASTABLE STATES
OXIDES
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
QUENCHING
REACTION KINETICS
TEMPERATURE EFFECTS
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
TETRAGONAL LATTICES
THERMOMECHANICAL TREATMENTS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES