Startseite Phase reaction of ceria in LPS–SiC with Al2O3–Y2O3 and AlN–Y2O3 additives
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Phase reaction of ceria in LPS–SiC with Al2O3–Y2O3 and AlN–Y2O3 additives

Paper presented at the 2nd Sino-German Symposium on Computational Thermodynamics and Kinetics and their Applications to Solidification
  • Z. Pan , O. Fabrichnaya , G. Schreiber , H. J. Seifert , R. H. Baney und J. S. Tulenko
Veröffentlicht/Copyright: 11. Juni 2013
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 101 Heft 11

Abstract

Dense SiC with addition of CeO2 was obtained by liquid phase sintering using different additives (Y2O3, Al2O3) and (Y2O3, AlN). The total amounts of additives (Al2O3 + Y2O3) and (AlN + Y2O3) were fixed at 10 mass.% and 10 vol.%, respectively. Two different molar ratios of Al2O3:Y2O3 additives, 1:1 and 5:3, were selected for investigation. Ratios of AlN:Y2O3 were selected as 3:2 and 4:1. Influences of both different ratios of Al2O3:Y2O3 and AlN:Y2O3 and amounts of CeO2 on sintering behaviour were investigated. The phase reaction products were identified by X-ray diffraction and microstructures were investigated using scanning electron microscopy with energy dispersive X-ray spectroscopy techniques. In the samples using Al2O3 + Y2O3 as sintering additives, the CeO2 was dissolved in Y4Al2O9 phase during sintering. The oxidation state of Ce4+ changed to Ce3+ and Ce3+ occupies Y3+ positions, causing increases in lattice parameters for Y4Al2O9 with CeO2 content. In samples with AlN + Y2O3 as sintering additives, Y10Al2Si3O18 and Y2Si3N4O3 were formed in the CeO2-free and CeO2 containing compositions. During sintering, the CeO2 dissolves in oxynitrides via a similar mechanism as in the Y4Al2O9 phase.

Keywords: LPS–SiC; Ceria; XRD; SEM/EDX; Phase reactions
* Correspondence address, Dr. Olga Fabrichnaya, T. U. Bergakademie Freiberg, Institut für Werkstoffwissenschaft, Gustav-Zeuner-Straβe 5, D-09599 Freiberg, Germany, Tel.: +49 3731 393156, Fax: +493731 393657, E-mail:

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Received: 2010-2-27
Accepted: 2010-8-27
Published Online: 2013-06-11
Published in Print: 2010-11-01

© 2010, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Editorial
  4. 2nd Sino-German Symposium on Computational Thermodynamics and Kinetics and their Applications to Solidification
  5. Basic
  6. Multiscale simulations on the grain growth process in nanostructured materials
  7. Thermodynamic re-modeling of the Co–Gd system
  8. Microstructure and tribological properties of in-situ Y2O3/Ti-5Si alloy composites
  9. Phase relations in the ZrO2–Nd2O3–Y2O3 system: experimental study and CALPHAD assessment
  10. Phase transition in nanocrystalline iron: Atomistic-level simulations
  11. Thermodynamic assessment of the Cr–Al–Nb system
  12. Experimental investigation and thermodynamic modeling of the Cu–Mn–Zn system
  13. Elastic constants and thermophysical properties of Al–Mg–Si alloys from first-principles calculations
  14. Predicting microsegregation in multicomponent aluminum alloys – progress in thermodynamic consistency
  15. Phase reaction of ceria in LPS–SiC with Al2O3–Y2O3 and AlN–Y2O3 additives
  16. Applied
  17. Phase equilibria in the Fe–Ti–V system
  18. A thermodynamic description of the Ce–La–Mg system
  19. Molar volume calculation of Ga–Bi–X (X=Sn, In) liquid alloys using the general solution model
  20. Microstructural analysis in the vacuum brazing of copper to copper using a phosphor–copper brazing filler metal
  21. Microstructural development of the hot extruded magnesium alloy AZ31 under cyclic testing conditions
  22. DGM News
  23. DGM News
https://doi.org/10.3139/146.110424
Schlagwörter für diesen Artikel
LPS–SiC; Ceria; XRD; SEM/EDX; Phase reactions

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Editorial
  4. 2nd Sino-German Symposium on Computational Thermodynamics and Kinetics and their Applications to Solidification
  5. Basic
  6. Multiscale simulations on the grain growth process in nanostructured materials
  7. Thermodynamic re-modeling of the Co–Gd system
  8. Microstructure and tribological properties of in-situ Y2O3/Ti-5Si alloy composites
  9. Phase relations in the ZrO2–Nd2O3–Y2O3 system: experimental study and CALPHAD assessment
  10. Phase transition in nanocrystalline iron: Atomistic-level simulations
  11. Thermodynamic assessment of the Cr–Al–Nb system
  12. Experimental investigation and thermodynamic modeling of the Cu–Mn–Zn system
  13. Elastic constants and thermophysical properties of Al–Mg–Si alloys from first-principles calculations
  14. Predicting microsegregation in multicomponent aluminum alloys – progress in thermodynamic consistency
  15. Phase reaction of ceria in LPS–SiC with Al2O3–Y2O3 and AlN–Y2O3 additives
  16. Applied
  17. Phase equilibria in the Fe–Ti–V system
  18. A thermodynamic description of the Ce–La–Mg system
  19. Molar volume calculation of Ga–Bi–X (X=Sn, In) liquid alloys using the general solution model
  20. Microstructural analysis in the vacuum brazing of copper to copper using a phosphor–copper brazing filler metal
  21. Microstructural development of the hot extruded magnesium alloy AZ31 under cyclic testing conditions
  22. DGM News
  23. DGM News
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