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Abstract

The need to join graphite and metal components is particularly important in the nuclear industry, especially in the first wall components of fusion reactors. The aim of this work was to find brazing agents which can wet steel and graphite without producing excessive alloying, steel dissolution or the formation of fragile components, and to determine the best thermal brazing cycles. Multiple brazings with three components (AISI 316L-Cu-Graphite or AISI 316L-Mo-Graphite) and four components (AISI 316L-Cu-W-Graphite) were made. Layers of W were produced on the graphite using chemical vapour deposition, while the Mo and certain brazing agents were deposited using vacuum plasma spray. It was found that multiple brazings were definitely more resistant to thermal shocks than simple junctions.

Additional information

Authors: BROSSA F, JRC Ispra (IT);SCHILLER P, JRC Ispra (IT);FRANCONI E, ENEA, Centro Ricerche Energia Frascati, Roma (IT)
Bibliographic Reference: Paper presented: ICFRM-5 Conference, Clearwater, Florida (US), Nov. 17-22, 1991
Availability: Available from (1) as Paper EN 36520 ORA
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