Fracture surface energy of UO2 and ThO2 containing additives.
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概要
- 論文の詳細を見る
The Hertzian indentation technique is used to study the cracking behavior and to measure the fracture surface energy of UO<SUB>2</SUB> and ThO<SUB>2</SUB> of high density containing simulated fission products (Nb, Zr). UO<SUB>2</SUB>+ZrO<SUB>2</SUB> of 98% density showed permanent "plastic" deformation in addition to Hertzian cone crack formation thus making a quantitative analysis impossible. The Nb<SUB>2</SUB>O<SUB>5</SUB> containing oxides, in particular ThO<SUB>2</SUB>+Nb<SUB>2</SUB>O<SUB>5</SUB>, had a more suitable microstructure and showed less or no permanent deformation. The fracture surface energy of ThO<SUB>2</SUB>+0.1 mol/o Nb<SUB>2</SUB>O<SUB>5</SUB> was γ=(2.6±0.4)Jm<SUP>-2</SUP>, and thus comparable to that of ThO<SUB>2</SUB> without additives, (2.5±0.3)Jm<SUP>-2</SUP>, indicating that the effect of Nb impurities and of excess oxygen introduced together with the Nb<SUP>+5</SUP> cancel each other.
- 一般社団法人 日本原子力学会の論文
著者
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INOUE Tadashi
Commission of the European Communities, Joint Research Centre Karlsruhe Establishment, European Institute for Transuranium Elements
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MATZKE Hansjoachim
Commission of the European Communities, Joint Research Centre Karlsruhe Establishment, European Institute for Transuranium Elements