Brazing carbon bodies to other bodies of temperature resistant materials

Abstract

Abstract BRAZING COMPOSITIONS AND METHODS OF UTILIZING THE SAME TO PRODUCE INTIMATE VACUUM-TIGHT CONNECTIONS BETWEEN CARBON BODIES AND OTHER BODIES OF TEMPERATURE-RESISTANT MATERIALS, SUCH AS HIGH MELTING METALS, CERAMICS, QUARTZ OR CARBON. THE BRAZING COMPOSITIONS ARE METAL BORIDES PER SE, EUTECTIC METAL BORIDE SYSTEMS PER SE, MIXTURES THEREOF AND MIXTURES THEREOF WITH METAL CARBIDES, SUCH AS MOLYBDENUM CARBIDES. THE METAL BORIDES ARE SELECTED FROM THE GROUP CONSISTING OF BORIDES OF NI, FE, CO, V, CR, MO, NB, TA, ZR, PD, PT, AND MIXTURES THEREOF. THE METHODS INCLUDE APPLYING, AS BY SPRAYING, IMMERSION, OR CHEMICAL REDUCTIVE DEPOSITION, THE BRAZING COMPOSITION AS A LIQUID PHASE ONTO THE BODY SURFACES TO BE JOINED AND BRIEFLY HEATING THE BRAZING COMPOSITION THEREAT TO A TEMPERATURE SLIGHTLY HIGHER THAN THE MELTILNG POINT OF THE BRAZING COMPOSITION IN A NON-OXIDIZING ATMOSPHERE. THE METHODS ALSO INCLUDE UTILIZING ELEMENTARY BORON PARTICLES INTERMIXED WITH VARIOUS METAL PARTICLES IN AN ORGANIC SUSPENSION AS THE BRAZING COMPOSITION AND ALSO INCLULDES UTILIZING THE INSTANT BRAZING COMPOSITIONS AS SUPPORT BASE FOR CONVENTIONAL BRAZING FILLER METALS.

Inventors

• 👤 Georg T K Eckert

Bibliographic Details