Abstract:
A theoretical study of evolution of mono- and diatomic gas bubbles in metals driven by the Ostwald ripening mechanism under annealing at earlyer and later coarsening stages is carried out. Results of the study are compared with known experimental annealing data in metals and alloys pre-implanted with helium. A comparative analysis is undertaken to assess materials that serve as structural elements in both fission and fusion reactors. Temperature dependencies for the bubble radius and density correspond closely with observed measurements. Ostwald ripening is presumably the most probable mechanism of gas bubble evolution in annealed materials taken for consideration.
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