Thermo dynamic Assessment and Microstructure of the ZrO2-CeO2-Al2O3 System  

作　　者：ShuigenHUANG LinLI J.Vleugels O.V.D.Biest PeilingWANG 

机构地区：[1]SchoolofMaterialsScienceandEngineering,ShanghaiUniversity,Shanghai200072,China [2]DepartmentofMTM,KatholiekeUniversiteitLeuven,B-3001Heverlee,Belgium [3]StateKeyLaboratoryofHighPerformanceCeramicsandSuperfineMicrostructure,ShangHaiInstituteofCeramics,ChineseAcademyofSciences,Shanghai200050,China

出　　处：《Journal of Materials Science & Technology》2004年第1期75-78,共4页材料科学技术（英文版）

基　　金：supported by the Flanders-China bilateral project(BIL 99/10);the Science and Technology Committee of Shanghai Municipality;the Commission of the European Communities in the framework of the Growth Project"BIOGRAD"(G5RD-CT2000-00354)

摘　　要：The ZrO2-CeO2-AI2O3 system has been assessed with the CALPHAD (Calculation of Phase Diagrams) technique using the PARROT procedure. The experimental information on the ZrO2-AI2O3, AI2O3-CeO2 systems as well as the isothermal sections of the ternary system at 1673 K and 1873 K is well reproduced. According to the assessed isothermal section at 1723 K, no alumina dissolves into the tetragonal zirconia phase. Specimens with different alumina content are fabricated from commercial 12 mol pct CeO2-stabilized ZrO2 powder (12Ce-ZrO2). The thermodynamic properties are consistent with the observed microstructure, which present a combination of tetragonal phase and alumina grains.The ZrO2-CeO2-AI2O3 system has been assessed with the CALPHAD (Calculation of Phase Diagrams) technique using the PARROT procedure. The experimental information on the ZrO2-AI2O3, AI2O3-CeO2 systems as well as the isothermal sections of the ternary system at 1673 K and 1873 K is well reproduced. According to the assessed isothermal section at 1723 K, no alumina dissolves into the tetragonal zirconia phase. Specimens with different alumina content are fabricated from commercial 12 mol pct CeO2-stabilized ZrO2 powder (12Ce-ZrO2). The thermodynamic properties are consistent with the observed microstructure, which present a combination of tetragonal phase and alumina grains.

关 键 词：CE-TZP A12O3 THERMODYNAMICS 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG146.414[金属学及工艺—金属材料]