Method for forming a drive hole in arc plasma spray...

Details Method for forming a drive hole in arc plasma spray... Method for forming a drive hole in arc plasma spray...

H - Electricity

01

F

327/72

H01F 41/02 (2006.01) H05B 7/00 (2006.01)

Patent

CA 1098182

ABSTRACT OF THE DISCLOSURE A method for forming a drive wire hole in a ferrite toroid phase shifter adapted to operate in the millimeter frequency range. The ferrite toroid is fabricated by the arc plasma spray process. A slab of boron nitride is initially bonded to the dielectric insert of the ferrite toroid and the ferrite powder is arc plasma sprayed on the composite boron nitride-dielectric structure. The formed ferrite toroid is then annealed, and during the annealing process, the boron nitride slab is completely sublimated to form the required drive wire hole.

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