Describe atomic ordering at grain boundaries in contrast to ordering in the bulk of a crystalline solid.
Please provide with the explanation.
Answers
Explanation:
Grain is the three dimensional continuous stacking of unit cells in the similar orientation throughout the volume, when the orientation of stacking is changed, than a grain boundary exist and It separates the two differently oriented grains
Answer:
A crystal is the region within which the crystal lattice is continuous. In metallurgy, grain is usually used to have the same meaning as crystal. In other cases, grain can be used to denote a particle, e.g. in a powder, and once that happens it becomes more complicated because a powder particle can, but need not, consist of more than one grain. "Crystal" is well-defined but the meaning of "grain" probably has to be inferred from context in a given publication.
As mentioned by Dr. Nobre, additional complexity can arise when there are slight discontinuities in the crystal lattice, such as dislocations, stacking faults, or anti-phase boundaries, that are generally not considered to disturb the lattice enough to mark the end of one crystal and the beginning of the next (hence the talk about domains).