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Atomic Structure of [110] Tilt Grain Boundaries in FCC Materials

Published online by Cambridge University Press:  02 July 2020

L. Merkle  and
L. J. Thompson
L. Merkle
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439
L. J. Thompson
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439
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Extract

High-resolution electron microscopy (HREM) has been used to study the atomic-scale structure and localized relaxations at grain boundaries (GBs) in Au, Al, and MgO. The [110] tilt GBs play an important role in polycrystalline fee metals since among all of the possible GB geometries this series of misorientations as a whole contains the lowest energies, including among others the two lowest energy GBs, the (111) and (113) twins. Therefore, studies of the atomic-scale structure of [110] tilt GBs in fee metals and systematic investigations of their dependence on misorientation and GB plane is of considerable importance to materials science. [110] tilt GBs in ceramic oxides of the fee structure are also of considerable interest, since in this misorientation range polar GBs exist, i.e. GBs in which crystallographic planes that are made up of complete layers of cations or anions can join to form a GB.

Thin singlecrystalline films of (110) Au were prepared by vacuum evaporation of Au onto (110) NaCl.

Type
Atomic Structure and Mechanisms at Interfaces in Materials
Information
Microscopy and Microanalysis , Volume 3 , Issue S2: Proceedings: Microscopy & Microanalysis '97, Microscopy Society of America 55th Annual Meeting, Microbeam Analysis Society 31st Annual Meeting, Histochemical Society 48th Annual Meeting, Cleveland, Ohio, August 10-14, 1997 , August 1997 , pp. 675 - 676
Copyright
Copyright © Microscopy Society of America 1997

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References

1.Wolf, D. and Merkle, K. L., in MATERIALS INTERFACES Atomic-level structure and properties. edited by Wolf, D. and Yip, S. (Chapman & Hall, London,1992)87.Google Scholar
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4. The authors acknowledge the use of the facilities of the ANL/MSD Electron Microscopy Center. This work was supported by the U.S. Department of Energy, Basic Energy Sciences- Materials Science, under contract W-31-109-Eng-38.Google Scholar