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2570397 
Journal Article 
Vacuum brazing of Inconel 600 sleeve to 316L stainless steel sheath of mineral insulated cable 
Srinivasan, G; Bhaduri, AK; Ray, SK; Shankar, V 
2008 
Yes 
Journal of Materials Processing Technology
ISSN: 0924-0136 
198 
1-3 
73-76 
WOS:000252564100010 
In mineral insulated (MI) triaxial cables for detectors, the 200 mu m thick zirconiated copper conductors are sheathed with 200 pm thick 316L stainless steel (SS). The process conditions for high-temperature vacuum brazing of Inconel 600 sleeves to 316L SS cable sheath, with a radial gap of 125-150 mu m between them, has been optimised using 40 mu m thick nickel-base BNi2 brazing alloy. The brazed joints, which were subjected to thermal cycling between 473 and 923 K over 50 thermal cycles to simulate the high-temperature operating conditions, was found to have adequate tensile strength similar to those in the as-brazed condition. During tensile testing, failure occurs in the cable sheath in all cases. The leak tightness of the brazed joints, in as-brazed and thermal-cycled conditions, both before and after tensile testing is also found to be satisfactory. (c) 2007 Elsevier B.V. All rights reserved. 
triaxial mineral insulated cable; high-temperature vacuum brazing; helium leak testing; thermal cycle