The suitability of copper/lithium alloys for application as wall material in tokamaks
In Cu/Li alloys of low lithium content, the lithium component segregates to the surface, forming a protective overlayer. When applied as wall material in a tokamak, the sputtering of the high-Z component copper can be reduced by a considerable amount. To learn about the behaviour of the Cu/Li binary system under particle bombardment, detailed investigations have been carried out during the last few years. The experiments show that wall temperatures above 400 C are necessary to achieve a distinct lithium coating effect. The protective layer cannot be maintained permanently under low-energy light-ion irradiation and needs a periodic conditioning procedure. However, a numerical extrapolation of measured layer lifetimes particle flux densities relevant to fusion reactors shows that it is worthwhile to consider a test of Cu/Li alloys as wall material in a tokamak.
Bibliographic Reference: Article: Journal of Nuclear Materials, Vols. 162-164 (1989), pp. 924-931
Record Number: 198910829 / Last updated on: 1994-12-01
Original language: en
Available languages: en