Structure-property characterization of a shock-loaded boron carbide-aluminum cermet
Shock-recovery experiments were performed on a 65 vol % B/sub 4/C-Al cermet as a function of shock pressure. Samples were recovered largely intact due to the use of confinement and ''soft-recovery'' techniques. Post-shock examination by optical and transmission electron microscopy (TEM) showed the B/sub 4/C structure to be unchanged up to 5 GPa, while the Al phase exhibited a high density of randomly distributed dislocations. After a shock of 10.6 GPa some of the B/sub 4/C grains displayed dislocation debris, but the majority showed no evidence of plastic deformation. Uniaxial compression testing of the unshocked cermet showed a 24% increase in strength from 1.94 GPa to 2.4 GPa with an increase in strain rate from 10/sup /minus/3/ s/sup /minus/1/ to 10/sup 3/ s/sup /minus/1/.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6506665
- Report Number(s):
- LA-UR-88-4059; CONF-890324-2; ON: DE89005455
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
ALUMINIUM
BORON CARBIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CERMETS
COMPOSITE MATERIALS
COMPRESSION STRENGTH
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEFORMATION
DISLOCATIONS
ELEMENTS
LINE DEFECTS
MATERIALS
MECHANICAL PROPERTIES
METALS
MICROSTRUCTURE
SHEAR
SHOCK WAVES
STRESSES