BONDING DISSIMILAR CERAMIC COMPONENTS

摘要

Adhesive compositions and methods for bonding materials with different thermal expansion coefficients is provided. The adhesive is formulated using a flux material, a low flux material, and a filler material, where the filler material comprises particulate from at least one of the two components being bonded together. A thickening agent can also be used as part of the adhesive composition to aid in applying the adhesive and establishing a desired bond thickness. The method of forming a high strength bond using the disclosed adhesive does not require the use of intermediary layer or the use of high cure temperatures that could damage one or both of the components being bonded together.

主权项

1. An adhesive for use in bonding together a first component comprising a ceramic having a first coefficient of thermal expansion with a second component comprising a ceramic having a second coefficient of thermal expansion that is different than the first coefficient of thermal expansion, the adhesive comprising,
a) a particulate having the same chemical composition as the first component; b) a fluxing agent; and c) a low flux material,the adhesive characterized in that application of heat to a layer of the adhesive that is in contact with bonding surfaces of the first and second components causes chemical composition changes to at least one the bonding surfaces resulting in a formed bond between the first and second components.