In the present study, the wetting behaviour of boron carbide by Ni based brazing alloys has been investigated. Based on the results of wetting experiments using sessile drop method, it has been revealed that these filler metals are generally able to wet B4C surface. This relates to the reactivity of Ni with this ceramic material. The presence of Si in these fillers and its reactivity with the surface of B4C play a major role in wetting improvement. In addition, the existence of Cr in the filler also improves this behaviour. Based on the results of wetting tests, a low wetting angle of 26° was obtained for the filler metal having the highest amounts of Si and Cr. In this article, the microstructure and chemical composition of the interfacial phases have been studied.
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