Equilibrium shapes of Pb inclusions at 90{degrees} tilt grain boundaries in Al
- Univ. of Copenhagen (Denmark)
- Lawrence Berkeley National Lab., CA (United States)
In the present study we have used a well-defined bicrystal geometry to study the morphology and structure of lead grain boundary inclusions in mazed bicrystal aluminum films containing mainly 90{degrees} <110> tilt boundaries with fixed misorientation but variable inclination. It was found that the shape, size and orientation of the inclusions in the grain boundaries depend on the inclination, i.e. the orientation of the grain boundary plane. Inclusions were all single crystalline and invariably faceted toward one aluminum grain and more rounded toward the other grain. Independent of grain boundary inclination, the faceted side was a section of the cuboctahedral equilibrium shape of inclusions in parallel topotaxy with the bulk aluminum matrix. The rounded side, where the inclusions were rotated by 90{degrees} with respect to the aluminum lattice, approximated a spherical cap consisting partly of somewhat flatter segments with complex faceting, illustrating the lack of distinctly flat low-energy facets.
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 468833
- Report Number(s):
- CONF-960877--
- Country of Publication:
- United States
- Language:
- English
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