Abstract
In the paper the influence of short T 300 carbon fibre embedded by two Ag72Cu26.5Ti1.5 brazing alloy foils as an interlayer is presented when joining alumina and stainless steel. Carbon fibre interlayer lowers the thermal expansion mismatch between both constituents so that cracking of the ceramics does not occur. Shear strength of the joint with the carbon fibre interlayer was 35 MPa in comparison with the one without the carbon fibre interlayer which was 6 MPa. Titanium from the brazing alloy diffuses into both interfaces as well as around each carbon fibre. Similarly, chromium diffuses to the ceramic-brazing alloy interface as well as around each carbon fibre. After brazing neither titanium nor main steel elements (Fe, Ni, Cr) are present in the brazing alloy itself.

Key words
Ag72Cu26.5Ti1.5 brazing alloy, alumina, stainless steel, carbon fibre

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