Are the grain boundaries a continuation of regular lattice structure from one grain to another?
Explain. They are called boundaries because this is where one crystal interacts with another. The lattice structure does not continue across the interface without mismatch. While there is some lattice, interaction or sharing it is not complete and there are many defects associated with the boundaries. The degree of mismatch determines if the boundary is a high angle boundary (lots of mismatch) or a low angle boundary (very little mismatch) A tilt boundary is an example of a low angle boundary. This is also one of the reasons that diffusion along grain boundaries is so much higher then through the bulk crystal. How would a salt and water solution clean a penny but a vinegar and salt solution will not clean a penny? What is the cause of this? I have been thinking about this overnight but I am not a chemist so I am unsure of the reactions. I do know that the penny gets shiny when you remove oxygen and impurities like sulfur from the surface. So lets reason together on this….The salt bre
