The grain boundary diffusion coefficient is the diffusion coefficient of a diffusant along a grain boundary in a polycrystalline solid. It is a physical constant denoted , and it is important in understanding how grain boundaries affect atomic diffusivity. Grain boundary diffusion is a commonly observed route for solute migration in polycrystalline materials. It dominates the effective diffusion rate at lower temperatures in metals and metal alloys. Take the apparent self-diffusion coefficient for single-crystal and polycrystal silver, for example. At high temperatures, the coefficient is the same in both types of samples. However, at temperatures below 700 °C, the values of with polycrystal silver consistently lie above the values of with a single crystal.
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| - Grain boundary diffusion coefficient (en)
- Зернограничная диффузия (ru)
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| - The grain boundary diffusion coefficient is the diffusion coefficient of a diffusant along a grain boundary in a polycrystalline solid. It is a physical constant denoted , and it is important in understanding how grain boundaries affect atomic diffusivity. Grain boundary diffusion is a commonly observed route for solute migration in polycrystalline materials. It dominates the effective diffusion rate at lower temperatures in metals and metal alloys. Take the apparent self-diffusion coefficient for single-crystal and polycrystal silver, for example. At high temperatures, the coefficient is the same in both types of samples. However, at temperatures below 700 °C, the values of with polycrystal silver consistently lie above the values of with a single crystal. (en)
- Зернограничная диффузия (англ. grain-boundary diffusion) — диффузия в твердых поликристаллических телах, сосредоточенная в узких (толщиной в несколько атомных слоев) зонах на границе зерен с различной кристаллографической ориентацией. (ru)
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| - The grain boundary diffusion coefficient is the diffusion coefficient of a diffusant along a grain boundary in a polycrystalline solid. It is a physical constant denoted , and it is important in understanding how grain boundaries affect atomic diffusivity. Grain boundary diffusion is a commonly observed route for solute migration in polycrystalline materials. It dominates the effective diffusion rate at lower temperatures in metals and metal alloys. Take the apparent self-diffusion coefficient for single-crystal and polycrystal silver, for example. At high temperatures, the coefficient is the same in both types of samples. However, at temperatures below 700 °C, the values of with polycrystal silver consistently lie above the values of with a single crystal. (en)
- Зернограничная диффузия (англ. grain-boundary diffusion) — диффузия в твердых поликристаллических телах, сосредоточенная в узких (толщиной в несколько атомных слоев) зонах на границе зерен с различной кристаллографической ориентацией. (ru)
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