METHOD FOR PREPARING A POWDER OF AN ALLOY BASED ON URANIUM AND MOLYBDENUM
    7.
    发明申请
    METHOD FOR PREPARING A POWDER OF AN ALLOY BASED ON URANIUM AND MOLYBDENUM 有权
    制备基于铀和钼的合金粉末的方法

    公开(公告)号:US20130333519A1

    公开(公告)日:2013-12-19

    申请号:US13977259

    申请日:2011-12-23

    IPC分类号: G21C21/02 B22F9/20

    摘要: The invention relates to a method for preparing a powder of an alloy based on uranium and molybdenum in a metastable γ phase, which comprises: a) putting at least one first reagent selected from uranium oxides and mixtures thereof, uranium fluorides and mixtures thereof, into contact with a second reagent consisting in molybdenum and a third reagent consisting in a reducing metal, the first, second and third reagents being in a divided form; b) reacting the reagents at a temperature≧the melting temperature of the third reagent and under an inert atmosphere, whereby this reaction leads to the formation of the alloy comprising uranium and molybdenum in the form of a powder, for which the particles are covered with a reducing metal oxide or fluoride layer; c) cooling the so formed powder at a rate at least equal to 450° C./hour; and d) removing the reducing metal oxide or fluoride layer which covers the particles of the powder of the alloy comprising uranium and molybdenum. It also relates to a method for manufacturing a nuclear fuel implementing this method.Applications: Manufacturing of nuclear fuels, notably for MTRs.

    摘要翻译: 本发明涉及一种在亚稳γ相中制备基于铀和钼的合金粉末的方法,其包括:a)将至少一种选自氧化铀及其混合物的铀氟化物及其混合物的第一试剂投入 与由钼组成的第二试剂和由还原金属组成的第三试剂接触,第一试剂,第二试剂和第三试剂为分开形式; b)在温度> =第三试剂的熔融温度和惰性气氛下使试剂反应,由此该反应导致形成粉末形式的包含铀和钼的合金,其中颗粒被覆盖 与还原金属氧化物或氟化物层; c)以至少等于450℃/小时的速率冷却如此形成的粉末; 以及d)除去覆盖包含铀和钼的合金粉末颗粒的还原性金属氧化物或氟化物层。 它还涉及一种实现该方法的制造核燃料的方法。 应用:核燃料的制造,特别是中期审查。

    PROCESS FOR PRODUCING POROUS METAL BODY
    10.
    发明申请
    PROCESS FOR PRODUCING POROUS METAL BODY 有权
    生产多孔金属体的方法

    公开(公告)号:US20090232692A1

    公开(公告)日:2009-09-17

    申请号:US12405367

    申请日:2009-03-17

    IPC分类号: B22F3/11

    摘要: Disclosed is a process of producing a porous metal body containing a metal component which is likely to be oxidized, by which process the amounts of residual carbon and residual oxygen therein are decreased, and by which the performance of the product porous body can be largely promoted. The process for producing a porous metal body by sintering a material of the porous metal body, which material is obtained by coating a slurry containing a metal powder and an organic binder on an organic porous aggregate, comprises a defatting step of treating the material of the porous metal body at a temperature not higher than 650° C. in an atmosphere containing carbon monoxide and carbon dioxide; a decarbonization step of treating the material of the porous metal body after the defatting step in an inert atmosphere or vacuum atmosphere at a temperature not higher than sintering temperature; and a sintering step of retaining the material of the porous metal body after the decarbonization step in an inert atmosphere, vacuum atmosphere, hydrogen atmosphere, or in a reducing atmosphere containing hydrogen gas and an inert gas at a temperature not higher than the melting point of the metal powder.

    摘要翻译: 公开了一种生产含有可能被氧化的金属成分的多孔金属体的方法,通过该方法可以减少残留碳和残余氧的量,从而可以大大促进产物多孔体的性能 。 通过烧结多孔金属体的材料来制造多孔金属体的方法,该材料通过将含有金属粉末和有机粘合剂的浆料涂覆在有机多孔聚集体上而获得,该方法包括:脱脂步骤, 在含有一氧化碳和二氧化碳的气氛中,不高于650℃的多孔金属体; 在惰性气氛或真空气氛中,在不高于烧结温度的温度下,在脱脂步骤之后处理多孔金属体的材料的脱碳步骤; 在惰性气氛,真空气氛,氢气氛或含有氢气和惰性气体的还原气氛中,在不高于熔点的温度的温度下,将脱碳后的多孔金属体的材料保持在 金属粉末。