Ceramics in the Si3N4–ZrO2–CeO2 System: Phase Composition Changes and Properties
-
Snezana Boškovic
and
Fritz Aldinger
Abstract
Silicon nitride-based compositions containing zirconia and ceria additives were prepared by hot pressing in argon atmosphere. The compositions studied can be divided into two groups: (a) with a constant total amount of ZrO2 + CeO2 additive (32 mol.%) within which the CeO2 content was varied from 0 to 6.2 mol.%, and (b) with various contents (10 to 42 mol.%) of ZrO2 + CeO2 additive, the ratio of ZrO2 to CeO2 staying constant at a level of 7.35:1. Phase compositions were determined by X-ray powder diffraction (XRD), while energy-dispersive X-ray microanalysis (EDX) was used for compositional analysis of the ZrO2 grains. The results showed that after sintering the Ce4+ ions were reduced to Ce3+. At low initial ceria concentrations, Si2N2O was formed beside β-Si3N4 and ZrO2 (the majority of which was monoclinic). At higher ceria concentrations, however, Si2N2O disappeared by reaction with ceria and silica to form Ce – N apatite. Nitrogen-containing zirconia phases were not found in the studied compositions, up to 1750 °C.
-
S. Boskovic is grateful to the Alexander von Humboldt Foundation for supporting this work.
References
1 Falk, L.K.L.; Rundgren, K.: J. Am. Ceram. Soc. 75 (1992) 28.10.1111/j.1151-2916.1992.tb05437.xSearch in Google Scholar
2 Cain, M.G.; Lewis, M.H.: J. Am. Ceram. Soc. 76 (1993) 1401.10.1111/j.1151-2916.1993.tb03918.xSearch in Google Scholar
3 Sigulinski, E.; Boskovic, S.: Ceram. Int. 25 (1999) 41.10.1016/S0272-8842(97)90082-1Search in Google Scholar
4 Eremenko, V.N.; Naidich, Yu.V.; Lavrienko, I.A.: Naukova dumka, Kiew (1968).Search in Google Scholar
5 Guha, J.P.; Goursat, P.; Billy, M.: J. Am. Ceram. Soc. 63 (1980) 119.10.1111/j.1151-2916.1980.tb10673.xSearch in Google Scholar
© 2001 Carl Hanser Verlag, München
Articles in the same Issue
- Frontmatter
- Editorial
- Günter Lange 65 Years
- Aufsätze/Articles
- Deformation and Microstructure of Titanium Chips and Workpiece
- Eigenspannungsabbau in zügig und zyklisch beanspruchten Schweißverbindungen
- Bruchmechanische Nachweise zur Stahlgütewahl für moderne Feinkornbaustähle
- Experimental Analysis of the Interaction of “Hot” and “Cold” Volume Elements during Thermal Fatigue of a Cooled Component Made from AISI 3161 Steel
- Microstructure and Cyclic Deformation Behavior of Wheel and Tire Steels in Technically Relevant Heat Treatments
- Dehnratenabhängige Beschreibung der Fließkurven für erhoöhte Temperaturen
- Ein einfaches Modell für die Kinetik der Rekristallisation
- Determination of the Elastic Modulus of Wear Resistant Coatings by Quantitative Acoustic Microscopy
- Processing, Microstructure and Properties of Nb–TiO2 ODS Materials for Surgical Implants
- Influence of Surface Treatment on the Pitting Corrosion Behaviour of High Alloyed Stainless Steels in a Chloride Solution
- Unfall durch Drahtseilriss in einer Tunnelbaustelle
- Synthesis of Nanocrystalline B2 Structured (Ru, Ir) Al in the Ternary Ru–Al–Ir System by Mechanical Alloying and its Thermal Stability
- Preparation of Ca-α-sialon Ceramics with Compositions along the Si3N4-1/2 Ca3N2:3AIN Line
- SiC–Si3N4 Nanocomposite Prepared by the Addition of SiO2 + C
- Ceramics in the Si3N4–ZrO2–CeO2 System: Phase Composition Changes and Properties
- The Al–Ca System, Part 1: Experimental Investigation of Phase Equilibria and Crystal Structures
- The Al–Ca System, Part 2: Calorimetrie Measurements and Thermodynamic Assessment
- Phase Relationships of the Gd-Zn System
- Ableitung des Kristallisationspfades in ternären Gusslegierungen
- Bildanalyse komplexer Werkstoffgefüge durch Texturanalyse und Korrelation mit den Eigenschaften durch neuronale Netze
- Grain Growth in the Nanocrystalline W–Cu and Cu–Pb Composite Powders Prepared by Mechanical Alloying
- Toughening and Strengthening Response in Ni3Al-Bonded Titanium Carbide Cermets
- Creep Behavior of γ-TiAl-Based Alloys with Fully Lamellar Microstore
- Elevated Temperature Deformation of P/M Dispersion - Strengthened Copper and Aluminium
- Evolution of the Microstructure during Hot Working of Gamma-Based TiAl Alloys
- Interface Motion of β-Silicon Nitride in a Liquid Phase
- Internal Friction and Creep of Titanium Aluminides with Different Microstructure
- Mitteilungen/Notifications
- Personen
- Conferences
Articles in the same Issue
- Frontmatter
- Editorial
- Günter Lange 65 Years
- Aufsätze/Articles
- Deformation and Microstructure of Titanium Chips and Workpiece
- Eigenspannungsabbau in zügig und zyklisch beanspruchten Schweißverbindungen
- Bruchmechanische Nachweise zur Stahlgütewahl für moderne Feinkornbaustähle
- Experimental Analysis of the Interaction of “Hot” and “Cold” Volume Elements during Thermal Fatigue of a Cooled Component Made from AISI 3161 Steel
- Microstructure and Cyclic Deformation Behavior of Wheel and Tire Steels in Technically Relevant Heat Treatments
- Dehnratenabhängige Beschreibung der Fließkurven für erhoöhte Temperaturen
- Ein einfaches Modell für die Kinetik der Rekristallisation
- Determination of the Elastic Modulus of Wear Resistant Coatings by Quantitative Acoustic Microscopy
- Processing, Microstructure and Properties of Nb–TiO2 ODS Materials for Surgical Implants
- Influence of Surface Treatment on the Pitting Corrosion Behaviour of High Alloyed Stainless Steels in a Chloride Solution
- Unfall durch Drahtseilriss in einer Tunnelbaustelle
- Synthesis of Nanocrystalline B2 Structured (Ru, Ir) Al in the Ternary Ru–Al–Ir System by Mechanical Alloying and its Thermal Stability
- Preparation of Ca-α-sialon Ceramics with Compositions along the Si3N4-1/2 Ca3N2:3AIN Line
- SiC–Si3N4 Nanocomposite Prepared by the Addition of SiO2 + C
- Ceramics in the Si3N4–ZrO2–CeO2 System: Phase Composition Changes and Properties
- The Al–Ca System, Part 1: Experimental Investigation of Phase Equilibria and Crystal Structures
- The Al–Ca System, Part 2: Calorimetrie Measurements and Thermodynamic Assessment
- Phase Relationships of the Gd-Zn System
- Ableitung des Kristallisationspfades in ternären Gusslegierungen
- Bildanalyse komplexer Werkstoffgefüge durch Texturanalyse und Korrelation mit den Eigenschaften durch neuronale Netze
- Grain Growth in the Nanocrystalline W–Cu and Cu–Pb Composite Powders Prepared by Mechanical Alloying
- Toughening and Strengthening Response in Ni3Al-Bonded Titanium Carbide Cermets
- Creep Behavior of γ-TiAl-Based Alloys with Fully Lamellar Microstore
- Elevated Temperature Deformation of P/M Dispersion - Strengthened Copper and Aluminium
- Evolution of the Microstructure during Hot Working of Gamma-Based TiAl Alloys
- Interface Motion of β-Silicon Nitride in a Liquid Phase
- Internal Friction and Creep of Titanium Aluminides with Different Microstructure
- Mitteilungen/Notifications
- Personen
- Conferences
