Auger electron spectroscopy studies of boron carbide
Auger electron spectroscopy has been used to probe the electronic structure of ion bombardment (IB) cleaned surfaces of B/sub 9/C and B/sub 4/C samples. The shapes of the B-KVV and C-KVV Auger lines were found to be relatively insensitive to the bulk stoichiometry of the samples. This indicates that the local chemical environments surrounding B and C atoms, respectively, on the surfaces of the IB cleaned samples do not change appreciably in going from B/sub 9/C to B/sub 4/C. Fracturing the sample in situ is a way of producing a clean representative internal surface to compare with the IB surfaces. Microbeam techniques have been used to study a fracture surface of the B/sub 9/C material with greater spatial resolution than in our studies of IB surfaces. The B/sub 9/C fracture surface was not homogeneous and contained both C-rich and B-rich regions. The C-KVV line for the C-rich regions was graphitic in shape. Much of the C-rich regions was found by IB to be less than 100 nm in thickness. The C-KVV line from the B-rich regions was carbidic and did not differ appreciably in shape from those recorded for the IB cleaned surfaces.
- Research Organization:
- Sandia National Laboratories, Albuquerque, NM 87185
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5634089
- Report Number(s):
- CONF-850786-
- Journal Information:
- AIP Conf. Proc.; (United States), Journal Name: AIP Conf. Proc.; (United States) Vol. 140:1; ISSN APCPC
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
AUGER ELECTRON SPECTROSCOPY
BORON CARBIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHEMICAL BONDS
COLLISIONS
CRYSTAL STRUCTURE
DATA
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ENERGY-LEVEL DENSITY
EXPERIMENTAL DATA
FABRICATION
FAILURES
FRACTURES
GRAIN BOUNDARIES
HOT PRESSING
INFORMATION
ION COLLISIONS
MATERIALS WORKING
MICROSTRUCTURE
NUMERICAL DATA
PRESSING
SPECTROSCOPY
STOICHIOMETRY
VERY HIGH PRESSURE
VERY HIGH TEMPERATURE