Ion implantation in ceramics-residual stress and properties
The average and integrated stresses have been measured by the indentation technique for a series of sapphire crystals implanted with chromium or iron using a wide range of ion beam energy and fluences. The stress is compressive in nature and the average residual stress is in the range of 1100 MPa, i.e. about the value of the bulk rupture strength of defect-free single crystalline sapphire. Data for specimens implanted with iron indicate that a saturation value in average stress is reached at 10/sup 16/ Fe/Cm/sub 2/ (160 keV) but a saturation for Cr-implantation is not apparent. The residual compressive stress has a marked influence on the apparent fracture toughness as measured by the indentation technique and the fracture strength measured in bend tests. 23 refs., 6 figs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6844381
- Report Number(s):
- CONF-8809115-1; ON: DE88015555
- Country of Publication:
- United States
- Language:
- English
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Cermets
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360206* -- Ceramics
Cermets
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ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CERAMICS
CHALCOGENIDES
CHARGED PARTICLES
CHROMIUM IONS
CORUNDUM
CRYSTALS
FRACTURE PROPERTIES
ION IMPLANTATION
IONS
IRON IONS
MECHANICAL PROPERTIES
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SAPPHIRE
STRESSES