Аннотация
Results of investigations into the influence of nonuniformity (discontinuity, the step structure) and speed of pellet compaction on the consolidation kinematics of uranium dioxide powders and quality of pellets in regards to cracks are presented. The stress field over the compact volume is plotted. The tendency of uranium dioxide powder to crack is shown to be associated with the instability of speed characteristics and the stress state in the powder volume under the nonuniform compaction. It is found that the imperfection in regards to cracks of pellets made of uranium dioxide powder with a dry binder is lower than that one with a liquid binder. A mechanism is proposed which ensures the uniform compaction mode and reduces waste in regards to cracks for compacts with liquid and dry binders.