Reactive brazing composition and process for alumina-containing ceramic materials

摘要

A composition for brazing an alumina-containing ceramic material to a ceramic material or metal consists of Mg and one or more of Pd, Pt, Au and their alloys. The composition consists of a Pd, Pt or Au alloy containing NOTGREATER 5 wt.% Mg, e.g. a Pd alloy containing 2-4.5 wt.% Mg. Also claimed is a method of brazing an element of alumina-containing ceramic material to an element of ceramic material or metal by positioning the above brazing composition, in foil form, between the elements and heating the assembly to 1300-1600 degrees C under an inert gas atmosphere.