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

A. I. Epishin,B. S. Bokstein,I. L. Svetlov,B. Fedelich, T. Feldmann,Y. Le Bouar,A. Ruffini,A. Finel,B. Viguier,D. Poquillon

Inorganic Materials: Applied Research（2018）

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摘要

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.

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关键词

single crystals of nickel-base superalloys, hot isostatic pressing (HIP), porosity, diffusion, vacancies

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