Chapter 22. Mechanical Properties of Ce0.9Gd0.1O2-x and Ce0.9Gd0.1O2-x + Al2O3 Composites

  1. Don Bray
  1. J. L. Routbort1,
  2. K. C. Goretta1,
  3. R. Doshi2,
  4. V. L. Richards2,
  5. M. Krumpelt2,
  6. J. Wolfenstine3 and
  7. A. R. De Arellano-López4

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294482.ch22

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3

22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3

How to Cite

Routbort, J. L., Goretta, K. C., Doshi, R., Richards, V. L., Krumpelt, M., Wolfenstine, J. and De Arellano-López, A. R. (1988) Mechanical Properties of Ce0.9Gd0.1O2-x and Ce0.9Gd0.1O2-x + Al2O3 Composites, in 22nd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 19, Issue 3 (ed D. Bray), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294482.ch22

Author Information

  1. 1

    Energy Technology Division Argonne National Laboratory, Argonne, IL 60439

  2. 2

    Chemical Technology Division Argonne National Laboratory, Argonne, IL 60439

  3. 3

    Geo-Centers, Inc., Army Materials Laboratory, 2800 Powder Mill Road, Adelphi, MD 20783

  4. 4

    Department of Condensed Matter Physics University of Sevilla, 41080 Sevilla, Spain

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1988

ISBN Information

Print ISBN: 9780470375587

Online ISBN: 9780470294482

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Keywords:

  • temperature;
  • thermal;
  • zirconia;
  • electrolyte;
  • polycrystalline

Summary

The room-temperature elastic moduli, fracture strength, and fracture toughness of dense, fine-grained, pure Ce0.9Gd0.1O1.95 and composites containing 1.3 and 9.1 wt.% Al2O3 were investigated. Addition of 9.1 wt.% Al2O3 to Ce0.9Gd0.1O1.95 changed the fracture mode from intergranular to transgranular and increased room-temperature fracture strength from 65 to 125 MPa and fracture toughness from 1.3 to 1.6 MPam1/2. In addition, steady-state compressive creep was measured for Ce0.9Gd0.1O1.95 and the Ce0.9Gd0.1O2-x + 9.1 wt.% Al2O3 composite. The stress exponent ≈1.3 and the activation energy ≈480 kJ/mole for Ce0.9Gd0.1O1.95 suggested diffusional flow controlled by the cations. There was no difference in creep rate between Ce0.9Gd0.1O2-x and the composite.