An essential consideration in the brazing of ceramics is the need to enhance wetting of the ceramic surface by liquid braze filler metals, which can be obtained by treating the surfaces to give them metallic coatings. The most widely used approach to coat ceramic surfaces is the molybdenum-manganese (Mo-Mn) process, which is generally used only for oxide ceramics. The other metallizing approach is the use of vapour deposited coatings of metal, which are typically made by the sputter coating process or the electron beam vapour coating process, which are too expensive for application on an industrial scale. In our work, a method of molten salt reaction has been developed for the metallization of Si3N4 The reaction and the structure of the interface between the coating and the Si3N4 substrate are described in this letter.
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