Strength change and chemical reactivity of ceramic breeder materials near operation conditions
| Autor: | H. Zimmermann, W. Dienst |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Annealing (metallurgy) Radiochemistry Young's modulus Strength reduction Microstructure symbols.namesake Compressive strength Nuclear Energy and Engineering Flexural strength visual_art visual_art.visual_art_medium symbols General Materials Science Irradiation Ceramic Composite material |
| Zdroj: | Journal of Nuclear Materials. :891-896 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/0022-3115(94)90964-4 |
| Popis: | Measurements of mechanical strength achieved on pellet samples of various ceramic breeder materials which had been irradiated in the COMPLIMENT experiment (1.8 dpa, 0.4–1.4% lithium burnup, 400–450°C and 650–700°C) indicated a general strength reduction. The Young's modulus decreased to 70–80%, and the compressive strength down to about 30% of the initial values. Concerning the fracture strength, increasing irradiation sensitivity was indicated in the order: LiAlO2, Li2ZrO3 → Li2SiO3, Li4SiO4. The largest irradiation effect seems to be due to coarse microstructure damage and could be advanced by the tritium production. The cladding attack observed in the sealed breeder rod samples was compared with the amount expected from tritium water production and, on the other hand, with that in annealing tests at 1 Pa H2O. Such tests were found to be conservative. Major chemical attack of the steel cladding seemed to be connected with an unusual content of oxidizing impurities in the breeder material. |
| Databáze: | OpenAIRE |
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