High-temperature brazing is a joining technique that makes it possible to produce compounds with mechanical and chemical properties that match those of the base material, provided the material and design are suitable for brazing. In high temperature brazing, the brazing material melts without flux, whereby the base material remains solid. A solid metallic compound is formed with properties that can be influenced by the process.
Large, complexly shaped parts and smaller quantities are high temperature brazed in single chamber vacuum furnaces. Brazing in vacuum (10-1 to 10-6 mbar) offers several advantages.

• No repeated oxidation of broken oxide layer caused by different thermal expansion of oxide and metal during heating
• Good wettability through the reduction of metal oxides at high temperatures in vacuum
• Prevention of gas inclusions in the brazing gap
• Gap-free, high-strength compounds