Faceting of high angle grain boundaries in the coincidence lattice
Faceting of high angle grain boundaries in SIGMA = 3 and SIGMA = 5 coincidence lattices of the fcc structure was studied using thinfilm bicrystal specimens of controlled geometry. A number of relatively high index boundaries in the coincidence lattices (containing relatively low planar densities of coincidence sites) was found to break up into low energy facets corresponding to low index planes of the coincidence lattices (containing high densities of coincidence lattice sites). These results are consistent with a general expectation that the grain boundary energy decreases as the planar density of coincidence sites increases, i.e., the two-dimensional periodicity of the boundary becomes shorter, and long-ranged distortions are reduced. (auth)
- Research Organization:
- Cornell Univ., Ithaca, N.Y. (USA). Materials Science Center
- NSA Number:
- NSA-29-031641
- OSTI ID:
- 4304276
- Report Number(s):
- COO--3158-25
- Country of Publication:
- United States
- Language:
- English
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