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邓鸿章,王震宏,赵福泽,宋衎,苏斌.铌在铀熔体中的溶解扩散行为研究[J].稀有金属材料与工程(英文),2020,49(6):1984~1988.[Deng Hongzhang,Wang Zhenhong,Zhao Fuze,Song Kan and Su Bin.Research on the Dissolution and Diffusion of Niobium in Uranium Melt[J].Rare Metal Materials and Engineering,2020,49(6):1984~1988.]
Research on the Dissolution and Diffusion of Niobium in Uranium Melt
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Received:April 24, 2019  Revised:June 27, 2019
DOI:
Key words: uranium-niobium alloy  solid-liquid interface  dissolution  diffusion  electromagnetic stirring
Foundation item:中国工程物理研究院材料研究所特聘人才专项基金(TP02201801)
Author NameAffiliation
Deng Hongzhang,Wang Zhenhong,Zhao Fuze,Song Kan and Su Bin  
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Abstract:
      Uranium-niobium (U-Nb) alloys have excellent corrosion resistance and good mechanical properties. They are good candidates for structural materials and functional materials of nuclear engineering. Fabrication of high quality uranium-niobium alloys using direct vacuum induction melting process is of great significance for efficiency promotion. But unsufficient alloying is the main problem of U-Nb alloy fabricated by direct vacuum induction melting process. The dissolution and diffusion of solid Nb in U melt is the key point of direct vacuum induction melting process of U-Nb alloy. So, in this paper, we investigated the dissolution and diffusion of Nb in U melt using experimental method. The actual dissolution rate of Nb in U melt with different temperature was obtained. The dissolution rate of Nb in U melt v and the melt temperature T have a relation of v=0.3651exp(-21150[K]/T)[m/s]. Scanning electron microscope observation shows sheet structure forms at the U/Nb interface during the dissolution process of Nb in U melt. When electromagnetic stirring is used, the dissolution rate of Nb in U melt increases obviously and the morphology of sheet structure at the U/Nb interface changes.