Brazed Lower Vacuum Housing for a Dewar

Timothy S. Romano
Tom K. Evans
Gary B. Hughes
Karl H. Neumann

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Also available from the United States Patent and Trademark Office. Website: http://www.uspto.gov.

NOTE: At the time of publication, the author Gary Hughes was not yet affiliated with Cal Poly.

Abstract

A lower vacuum housing (34) of a sensor dewar (26) is fabricated in a single brazing operation from ceramic and metallic components. The components are assembled with ceramic-to-metal interfaces and metal-to-metal interfaces. Brazing is accomplished by active brazing of the ceramic-to-metal interfaces and non-active brazing of the metal-to-metal interfaces. Specific combinations of active braze alloys and non-active braze alloys are provided for various combinations of dewar materials.