| 11. | Grain boundaries are also present in magnetic domains in magnetic materials.
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| 12. | These alloys are notable for their toughness, grain boundaries between crystallites.
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| 13. | In particular, corrosion along grain boundaries may cause deterioration of a sintered magnet.
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| 14. | Grain boundary migration plays an important role in many of the mechanisms of creep.
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| 15. | This helps dislocation movement along grains and across grain boundaries.
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| 16. | Grain boundaries are in general only a few nanometers wide.
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| 17. | Staining between grain boundaries may be visible in dyed imitations.
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| 18. | Grain boundaries disrupt the motion of dislocations through a material.
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| 19. | So the number of particles n intersecting a unit area of grain boundary is:
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| 20. | This enhances grain boundary diffusion and migration as well as densification of the material.
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