X-ray radiography of alumina to kovar joining

Abstract EN

In this work alumina samples were used to be joined with kovar alloy by using different filler types.

Fillers were formed with different concentrations of Silver, Copper, and Titanium powdered metals.

These fillers where by mixing powders and compacting by hydraulic press, and sintering by tube furnace with argon atmosphere of 1100 ◦C and time of 60 min.

Alumina / Kovar assemblies were joined in vacuum furnace of pressure of 2x10⁻⁴ torr at temperature of 850 ◦C and time of 20 min.

.X-ray radiography was used evaluates and detect the defect in contact area Three types of defects were detected namely cracks, voids and Non uniformity.

Shear test was achieved to determine joint strength.

Correlation between shear test (destructive test) and X- ray radiography (Nondestructive test) was found.