Research of Zirconia-based Oxide Spheres for Cermet Fuel: Production through Internal Gelation Process and the Compatibility with Zr, Zircaloy-4 and Si

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概要

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• Optimizing of sol-gel process was carried out for manufacturing of zirconia based oxide spheres used in CERMET fuels. In addition compatibility of CERMET fuels was studied. The Er_<0.05>Y_<0.1>Ce_xZr_<0.85-x>O_<1.925> (x=0.0-0.2) oxide spheres were made by preparation of suitable starting materials and dropping method for an internal gelation process, and through suitable drying, calcination and sintering process. However, further studies were needed for optimizing the sintering condition. About the reaction of YSZ (yttria-stabilized zirconia) with Zr, Zry4 and Si, isothermal heating tests have been done at the temperature range from 1073K to 1423K for a maximum of 112 days. Some reactions between YSZ and Zr were observed at temperature >___ 1273K, which means the formation of metallic reaction layer at the interface between them and the occurrence of metallic phases inside the YSZ. Similar results were observed for the YSZ-Zry4 (cladding) system. The YSZ and Si were compatible below the temperature of 1273K. However, above the temperatures, Si attacked YSZ so that the reaction layers formed on the YSZ side.

• 九州大学の論文

著者

• Inagaki Yaohiro

  Department Of Applied Quantum Physics & Nuclear Engineering Kyushu University

• Tatsumi Arima

  Department Of Applied Quantum Physics & Nuclear Engineering Kyushu University

• Idemitsu Kazuya

  Department Of Applied Quantum Physics & Nuclear Engineering Kyushu University

• IDEMITSU Kazuya

  Faculty of Engineering, Institute of Environmental Systems, Kyushu University

• INAGAKI Yaohiro

  Faculty of Engineering, Institute of Environmental Systems, Kyushu University

• ARIMA Tatsumi

  Faculty of Engineering, Institute of Environmental Systems, Kyushu University

• IDEMITSU Kazuya

  Department of Applied Quantum Physics & Nuclear Engineering, Kyushu University

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