Brazing of Mo to a CuZr alloy for the production of bimetallic raw materials for the CLIC accelerating structures

Future linear accelerators, as CLIC (Compact LInear Collider), are extremely demanding in terms of material properties. Traditionally accelerating structure is made of brazed OFE copper parts. For the high conducting regions submitted to mechanical fatigue, CuZr would represent an improved selection...

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Bibliographic Details
Published in:Journal of materials processing technology 2010-03, Vol.210 (5), p.791-798
Main Authors: Salvo, Milena, Casalegno, Valentina, Rizzo, Stefano, Ferraris, Monica, Izquierdo, Gonzalo Arnau, Heikkinen, Samuli, Sgobba, Stefano, Taborelli, Mauro
Format: Article
Language:English
Subjects:
Bimetals
Brazing
Copper
Copper alloy
Feasibility
Joining
Linear accelerator
Materials selection
Raw materials
Refractory metal
Refractory metals
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Summary:Future linear accelerators, as CLIC (Compact LInear Collider), are extremely demanding in terms of material properties. Traditionally accelerating structure is made of brazed OFE copper parts. For the high conducting regions submitted to mechanical fatigue, CuZr would represent an improved selection than pure copper while for regions where the highest electric field is applied a refractory metal, i.e. Mo, could result in a better performance. The feasibility of joining such materials, namely CuZr (UNS C15000) and pure Mo has been investigated. The joining method developed and investigated here consists in a vacuum brazing process exploiting a Cu-based brazing filler applied under appropriate vacuum conditions. Apparent shear strength (adapted from ASTM B898) on the joined samples was about 200 MPa.
ISSN:0924-0136
DOI:10.1016/j.jmatprotec.2010.01.010