Interaction of implanted deuterium and helium with beryllium: radiation enhanced oxidation
The interaction of implanted deuterium and helium with beryllium is of significant interest in the application of first wall coatings and other components of fusion reactors. Electropolished polycrystalline beryllium was first implanted with a Xe backscatter marker at 1.98 MeV followed by either implantation with 5 keV diatomic deuterium or helium. A 2.0 MeV He beam was used to analyze for impurity buildup; namely oxygen. The oxide layer thickness was found to increase linearly with increasing implant fluence. A 2.5 MeV H/sup +/ beam was used to depth profile the D and He by ion backscattering. In addition the retention of the implant was measured as a function of the implant fluence. The mean depth of the implant was found to agree with theoretical range calculations. Scanning electron microscopy was used to observe blister formation. No blisters were observed for implanted D but for implanted He blisters occurred at approx. 1.75 x 10/sup 17/ He cm/sup -2/. The blister diameter increased with increasing implant fluence from about 0.8 ..mu..m at 10/sup 18/ He cm/sup -2/ to 5.5 ..mu..m at 3 x 10/sup 18/ He cm/sup -2/.
- Research Organization:
- Sandia Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- EY-76-C-04-0789
- OSTI ID:
- 6190151
- Report Number(s):
- SAND-79-0330C; CONF-781053-12
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360106 -- Metals & Alloys-- Radiation Effects
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
ALKALINE EARTH METALS
BACKSCATTERING
BERYLLIUM
BLISTERS
CHEMICAL REACTIONS
COATINGS
CRYOGENIC FLUIDS
DEUTERIUM
ELEMENTS
FIRST WALL
FLUIDS
HELIUM
HYDROGEN ISOTOPES
ION IMPLANTATION
ISOTOPES
LIGHT NUCLEI
METALS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
OXIDATION
RARE GASES
SCATTERING
STABLE ISOTOPES
THERMONUCLEAR REACTOR MATERIALS
THERMONUCLEAR REACTOR WALLS
XENON