Wettability of Ni–Cr filler on SiC ceramic and interfacial reactions for the SiC/Ni–51Cr system

The chromium addition remarkably improves the wettability of SiC/Ni–Cr systems within the Cr content range of 10–60 wt.%. For the SiC/Ni–51Cr system, a reaction layer about 100 μm thick exists between the SiC ceramic and the filler layer and is composed mainly of Ni2Si and graphite with a little Cr23C6, whereas the filler layer consists mainly of Cr23C6 and Ni2Si. Both the interfacial reactions and the formation of reaction products contribute to the improvement of the wetting of SiC/Ni–Cr systems.

► The chromium addition remarkably improves the wettability of SiC/Ni-Cr systems.
► The interfacial reactions are investigated for the SiC/Ni-51Cr system.
► The factors affecting the wettability of SiC/Ni-Cr systems are discussed.