DEVELOPMENT AND CHARACTERIZATION OF BE GLIDCOP(R) JOINTS OBTAINED BY HOT ISOSTATIC PRESSING FOR HIGH-TEMPERATURE WORKING-CONDITIONS/

Beryllium is a suitable candidate for plasma facing components (PFC) s uch as divertor or first wall in the ITER project. Due to their high t hermal conductivity, copper alloys are used as the heat sink material. Consequently, use of beryllium requires that it has to be joined to t he Cu heat sink by some method. In this study, the joining of berylliu m onto the copper alloy Glidcop(R) is achieved by hot isostatic pressi ng diffusion bonding (HIPB). This joining technique allows a homogeneo us bonding. As direct bonding between Be and Cu alloy induces intermet allics that are deleterious to the joint, an interlayer is placed betw een the two materials. The interlayer has been chosen regarding the me tallurgical structure and the mechanical properties of beryllium relat ively to the Glidcop(R) alloy. This paper describes the structure of j oints performed with the help of HIPB at temperature higher than 800 d egrees C. (C) 1998 Elsevier Science B.V. All rights reserved.