Production and test results for the C + SiC alloy coating for the 60 tile beam armor/limiter array in Doublet III. Annual report, January 1, 1983-September 30, 1983

Technical Report · Tue Nov 01 04:00:00 EST 1983

OSTI ID:5143734

Hopkins, G; Trester, P; Kaae, J

Sputtering characteristics of this C + SiC alloy material have been measured with hydrogen ion beams and an almost complete suppression of chemical sputtering (methane formation) has been observed at tempertures below 1000/sup 0/C. This accounts for its excellent erosion resistance compared to carbon. An electron beam has been uesd to simulate the thermal pulse response of the coating to normal discharges in Doublet III. Heat loads up to 20 kW/cm/sup 2/ for up to 0.5 sec were employed. The coating survives up to the limit of graphite substrate for the Doublet III tile design. Heat loads from disruptions (up to 5 MJ/cm/sup 2/; 100 ..mu..s) were simulated with a 30 nsec laser beam pulse of 0.3 MJ/m/sup 2/. A large fraction of the energy was absorbed in vaporization of about 10 ..mu..m of the surface material with no observable damage to the underlying remaining material (approx. 90 ..mu..m). This indicates excellent resistance to disruptions.

• Research Organization: GA Technologies, Inc., San Diego, CA (USA)
• DOE Contract Number: AT03-76ET51011
• OSTI ID: 5143734
• Report Number(s): GA-A-17373; ON: DE84009666
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
ALKANES
BEAMS
CARBIDES
CARBON
CARBON COMPOUNDS
CHARGED PARTICLES
DOUBLET REACTORS
ELEMENTAL MINERALS
ELEMENTS
EROSION
FIRST WALL
GRAPHITE
HYDROCARBONS
HYDROGEN IONS
ION BEAMS
IONS
MATERIALS
METHANE
MINERALS
NONMETALS
ORGANIC COMPOUNDS
PLASMA DISRUPTION
SILICON CARBIDES
SILICON COMPOUNDS
SPUTTERING
SUBSTRATES
THERMONUCLEAR REACTOR MATERIALS
THERMONUCLEAR REACTOR WALLS
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS