Uranium dioxide/molybdenum metal ceramic composite fuel and preparation method thereof

The invention discloses uranium dioxide/molybdenum metal ceramic composite fuel and a preparation method thereof, and aims at solving the problem that the existing ceramic uranium dioxide has the deficiency of thermal conductivity property. The fuel takes advantage of advantages of high melting point, high thermal conductivity and low neutron-absorption cross-section of metal molybdenum, adds an appropriate amount of molybdenum powder in a uranium dioxide material, performs presintering on a powder blank in reducing atmosphere, greatly reduces the content of a high interface thermal resistancecompound (molybdenum oxide) in the fuel, combines a discharge plasma sintering method, obviously reduces the sintering temperature, effectively regulates a phase interface structure of the fuel, andimproves the thermal conductivity of uranium dioxide. The fuel has the advantages that high sense uranium dioxide/molybdenum composite fuel with excellent thermal conductivity can be rapidly and efficiently obtained, the fuel