Anisotropic microhardness in single-crystal and polycrystalline BaTiO{sub 3}.
The room-temperature hardness of single-crystal and dense polycrystalline BaTiO{sub 3} was investigated by microindentation. The longer diagonal of the Knoop indenter was oriented either parallel or perpendicular to the poled axis of the material. The hardness of the unpoled sample was isotropic. However, hardnesses in the poled samples were anisotropic, with the highest hardnesses resulting when the longer diagonal was parallel to the poled axis. The hardness anisotropy may be due primarily to residual stresses caused by the piezoelectric coupling effect.
- Research Organization:
- Argonne National Laboratory (ANL)
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 938274
- Report Number(s):
- ANL/ET/JA-28843
- Journal Information:
- J. Mater. Sci., Journal Name: J. Mater. Sci. Journal Issue: 3 ; 1998 Vol. 33; ISSN JMTSAS; ISSN 0022-2461
- Country of Publication:
- United States
- Language:
- ENGLISH
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