A semi-coherent interface and a low-angle grain boundary are two different terms for the same thing. True? False? or Not enough information to answer? Which option is correct?
To determine whether a "semi-coherent interface" and a "low-angle grain boundary" are the same thing or not, we need to understand their definitions and characteristics.
A semi-coherent interface refers to the boundary between two crystal grains where there is limited alignment of the atomic lattice planes. In other words, there is some degree of strain or dislocation at the interface, but the mismatch between the lattice planes is not significant enough to cause complete separation or the formation of a high-angle grain boundary.
On the other hand, a low-angle grain boundary represents a boundary between two crystals or grains that are slightly misaligned but still maintain a low misorientation angle. Typically, a low-angle grain boundary has an orientation difference of less than 15 degrees.
Based on the definitions, we can conclude that a semi-coherent interface and a low-angle grain boundary are not the same thing. While both involve a certain degree of misalignment or strain at the interface, a semi-coherent interface does not necessarily imply a low misorientation angle. The terms refer to different aspects of crystal boundaries.
Therefore, the correct answer to the question is: False, a semi-coherent interface and a low-angle grain boundary are not the same thing.