In:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, American Vacuum Society, Vol. 4, No. 3 ( 1986-05-01), p. 1227-1231
Abstract:
We discuss the use of composite materials based on the use of self-sustaining coatings to reduce sputtering-induced erosion in magnetic confinement fusion devices while providing enhanced high-heat flux properties. One material, a copper–lithium alloy has been described previously. A second group of materials consists of porous tungsten, tungsten carbide, or tantalum, impregnated with an alkali metal alumino-silicate. These materials form an alkali metal overlayer similar to that found on the Cu–Li alloy. A third group of materials is obtained by infiltrating the porous high-Z refractory metal with an alkali-metal-bearing alloy such as Cu–Li or Al–Li. These materials combine the high thermal conductivity of the infiltrate material with the high-temperature strength and melt layer stability of tungsten or tantalum. Calculations of the sputtering properties indicate that it may be possible to use a tungsten composite limiter at plasma edge temperature up to ∼300 eV.
Type of Medium:
Online Resource
ISSN:
0734-2101
,
1520-8559
Language:
English
Publisher:
American Vacuum Society
Publication Date:
1986
detail.hit.zdb_id:
1475424-1
detail.hit.zdb_id:
797704-9
