Thermodynamic evaluation of the ZrO[sub 2]-CeO[sub 2] system

Journal Article · Mon Aug 01 04:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90291-7· OSTI ID:7174917

Du, Y; Yashima, Masatomo; Koura, Toshiaki; Kakihana, Masato; Yoshimura, Masahiro ^[1]

---

1. Tokyo Inst. of Technology, Yokohama (Japan). Research Lab. of Engineering Materials

Zirconia doped with MgO, CaO, Y[sub 2]O[sub 3] and rare earth oxides is a remarkable material due to its technological importance, basic scientific interest and superior synthetic properties. Knowledge of phase diagrams and thermodynamic properties is of great importance in the production and application of zirconia-based ceramic materials. Recently, thermodynamic modeling of zirconia-bearing systems has received considerable attention because of the difficulties to construct zirconia-based phase diagrams and thermodynamic properties by means of experimental methods. The modeling for binary systems can be used to check for internal consistency between thermodynamic and phase diagram data and to provide optimal thermodynamic parameters. The predicted ternary phase diagrams based on the description of the binary systems give a prospect of phase relations in the ternary systems, which have not been established experimentally and have not made it possible to design efficient experiments. The same is true of going from ternary systems to a quaternary one and so on. In the laboratory the authors are currently engaged in a thermodynamic modeling of the ZrO[sub 2]-CeO[sub 2]-REO[sub 1.5] (RE = Rare Earth) systems with a view to develop a database for the zirconia-based systems. The present article reports on the thermodynamic analysis of the ZrO[sub 2]-CeO[sub 2] system. The thermodynamic modeling of the C[sub ss] (solid solution of cubic ZrO[sub 2] and CeO[sub 2]) and T[sub ss] (solid solution based on tetragonal ZrO[sub 2]) equilibrium in the ZrO[sub 2]-CeO[sub 2] system has been conducted, firstly, by one of the authors using two-term lattice stability values. In view of the fact that the two-term lattice stabilities are now out of date and there has been abundant information on the ZrO[sub 2]-CeO[sub 2] system since the previous assessment, a new assessment of this system is necessary.

• OSTI ID: 7174917
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 31:3; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
DIAGRAMS
DISPERSIONS
MATHEMATICAL MODELS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHASE STUDIES
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SOLID SOLUTIONS
SOLUTIONS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES