Molybdenum-based metal ceramic nuclear fuel pellet and preparation method thereof

The invention discloses a molybdenum-based metal ceramic nuclear fuel pellet, which comprises a molybdenum-based metal ceramic base body, through hole structures which are evenly arranged in an arraymode are formed in the molybdenum-based metal ceramic base body, the inner walls of the through hole structures are provided with protective layers, and the protective layers completely cover the inner walls of the through hole structures. A uniform molybdenum-based metal coating is formed on the surfaces of graphite rods, the graphite rods are uniformly arranged in molybdenum-based metal ceramicprecursor powder in an array manner, and after sintering, through holes with molybdenum-based metal protective layers with certain thicknesses on the inner walls are formed in a fuel pellet base bodythrough mechanical finish machining processes such as cutting, cutting, drilling and grinding; direct contact between a ceramic phase in the molybdenum-based metal ceramic base body of the fuel pelletand the external environmen