Radiation Damage in Multiphase Ceramics
- University of California, Irvine, Chemical Engineering and Materials Science, 916 Engineering Tower, Irvine, CA, 92697-2575 (United States)
- University of Tennessee, Knoxville, Materials Science and Engineering, 330 Ferris Hall, 1508 Middle Drive, Knoxville, TN, 37996-2100 (United States)
Ceramics belong to the promising class of radiation damage resistant materials. In highly radiation damage tolerant materials, defect annihilation counteracts and mitigates defects generated by irradiation. One route to annihilate defects is the migration of point defects to grain boundaries, which act as efficient sinks for defects. Defect migration to the grain boundaries can be enhanced by shortening the distance between the grain boundary sinks and the defects. Thus nano-crystalline ceramics have been observed to be more tolerant to radiation damage than ceramics with larger grains. However, at high temperatures, which typically exist in a nuclear reactor, nano-grains in single-phase materials will grow and irradiation induces additional grain growth. Once the grains grow larger, the material will no longer be as radiation resistant. In this study, new composite materials are to be engineered that will retain the fine grain size under irradiation at high temperature. Multiple phases of different chemical compositions inhibit grain growth by blocking the diffusion pathway between like phases. (authors)
- OSTI ID:
- 23042551
- Journal Information:
- Transactions of the American Nuclear Society, Vol. 115; Conference: 2016 ANS Winter Meeting and Nuclear Technology Expo, Las Vegas, NV (United States), 6-10 Nov 2016; Other Information: Country of input: France; 7 refs.; available from American Nuclear Society - ANS, 555 North Kensington Avenue, La Grange Park, IL 60526 (US); ISSN 0003-018X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Radiation tolerance of nanocrystalline ceramics: Insights from yttria stabilized zirconia
Competing Effects Of Electronic And Nuclear Energy Loss On Microstructural Evolution In Ionic-covalent Materials