粉末冶金法制备核燃料包壳FeCrAl合金研究进展

燃料包壳是核反应堆安全运行的重要保障。福岛核事故后，国内外开展了大量新型事故容错燃料包壳的研发工作。由于具有抗高温氧化和高强度等优异的综合性能，FeCrAl合金已成为新一代事故容错燃料包壳的重要候选材料之一。经过多年积累，核燃料包壳FeCrAl合金的设计和制备研究已取得一定进展。利用粉末冶金方法制备性能更为优异的氧化物弥散强化FeCrAl合金前景广阔，受到国内外学者的广泛关注。本文综述了核燃料包壳FeCrAl合金的成分设计、熔炼制备和粉末冶金制备的研究现状，分析了不同方法制备合金的组织性能及存在的问题，对未来核燃料包壳FeCrAl合金的设计和制备进行了展望。

Research progress on FeCrAl alloys used for nuclear fuel cladding prepared by powder metallurgy

The fuel cladding plays an important role for the safe operation of the nuclear reactors.After the Fukushima nuclear accident,a large number of new types of the accident-tolerant fuel cladding have been developed.FeCrAl alloys have become one of the important candidate materials for the new generation of the accident-tolerant fuel cladding due to the excellent comprehensive properties,such as the high temperature oxidation resistance and the high strength.After years of research and development,some progress has been made in the design and preparation of FeCrAl alloys used for the nuclear fuel cladding.As one of the main research directions,the preparation of the oxide dispersion strengthened FeCrAl alloys with the better performance by powder metallurgy shows a broad prospect and has attracted the extensive attention from scholars at home and abroad.In this paper,the research status of the composition design,smelting,and powder metallurgy for the FeCrAl alloys used for the nuclear fuel cladding were reviewed.The microstructure,properties,and the existing problems of the FeCrAl alloys prepared by the different methods were analyzed.The future design and preparation of the FeCrAl alloys used for the nuclear fuel cladding were prospected.