A Vacancy Model of Pore Annihilation During Hot Isostatic Pressing of Single Crystals of Nickel-Base Superalloys

An improved diffusion model of pore annihilation during hot isostatic pressing of single crystals of nickel-base superalloys is proposed. The model considers dissolution of pores by emission of vacancies and their diffusion sink to low-angle boundaries. The calculation, which takes into account pore size distribution,predicts the kinetics of pore annihilation similar to experimental one

Diffusion, segregation and stresses in materials

Proceedings of International Conference on Diffusion, Segregation and Stresses in Materials, Moscow, Russia, May 27-31, 2002