Paper Title:
Basic Concept on Structural Design Criteria for Zirconia Ceramics Applying to Nuclear Components
  Abstract

As an advanced in-core material in high temperature gas-cooled reactors (HTGRs), superplastic ceramics is attractive due to the possibility of the plastic working. For the application to the nuclear fields, the basic concept of design criteria was studied for typical superplastic ceramics, tetragonal zirconia polycrystals containing 3mol% yttria (3Y-TZP). The experimental results on 3Y-TZP showed that it is possible to apply the Weibull weakest-link theory to decide the stress limits in the criteria. The Weibull parameter m was evaluated as 9.5 for the bending and as 26.5 for the compressive. The applicability of the Weibull theory was also verified by the bending test results with different span. Based on the graphite structural design guidelines for the High Temperature Engineering Test Reactor (HTTR), the design stress limits for 3Y-TZP was proposed. It was shown that the proposed stress limits have appropriate safety margin and thought to be effective to evaluate the integrity of in-core structure made of 3Y-TZP.

  Info
Periodical
Key Engineering Materials (Volumes 297-300)
Edited by
Young-Jin Kim, Dong-Ho Bae and Yun-Jae Kim
Pages
728-733
DOI
10.4028/www.scientific.net/KEM.297-300.728
Citation
T. Shibata, J. Sumita, S. Baba, M. Yamaji, M. Ishihara, T. Iyoku, N. Tsuji, "Basic Concept on Structural Design Criteria for Zirconia Ceramics Applying to Nuclear Components ", Key Engineering Materials, Vols. 297-300, pp. 728-733, 2005
Online since
November 2005
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Price
$35.00
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