Ion implantation in ceramics-residual stress and properties

Conference · Fri Jan 01 00:00:00 EST 1988

OSTI ID:6844381

McHargue, C J; O'Hern, M E; White, C W; Lewis, M B

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
• Resource Relation: Conference: International conference on surface modification of metals by ion beams, Riva Del Garda, Italy, 12 Sep 1988; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SAPPHIRE
FRACTURE PROPERTIES
CERAMICS
CHROMIUM IONS
CRYSTALS
ION IMPLANTATION
IRON IONS
STRESSES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
CORUNDUM
IONS
MECHANICAL PROPERTIES
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
360206* - Ceramics
Cermets
& Refractories- Radiation Effects
360203 - Ceramics
Cermets
& Refractories- Mechanical Properties