Contact material of vacuum interrupter and manufacturing...

Details Contact material of vacuum interrupter and manufacturing... Contact material of vacuum interrupter and manufacturing...

C - Chemistry, Metallurgy

22

C

75/1.3

C22C 9/00 (2006.01) C22C 27/00 (2006.01) C22C 27/06 (2006.01) H01H 1/02 (2006.01)

Patent

CA 1217074

ABSTRACT Contact materials of a vacuum interrupter and producing process therefor are disclosed. The contact materials provide a contact which is much high in relatively large current and small lagging and leading current interrupting capabilities and dielectric strength while a little in an anti-welding capability down. The contact materials are composed of between 20 and 70 weight % copper, between 5 and 70 weight % molybdenum and between 5 and 70 weight % chromium. The contact material is produced by diffusion bonding a mixture of molybdenum powder and chromium powder into a porous matrix and infiltrating the matrix with copper. Alternatively, the contact materials may be produced by sintering a mixture of three metal powders. - 32 -

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