Thermodynamic Brazing Alloy Design for Joining Silicon Carbide

Using solution thermodynamic theory, a Ni‐Cr Si alloy, based on the Ni/Cr ratio of AWS BNi‐5 (Ni‐18Cr‐19Si (atom%)), was designed for brazing SiC ceramics. The optimum thermodynamic composition was computed to be Ni‐14.3Cr‐36Si (atom%). Brazing experiments were conducted to assess the effect of changing the Si content away from this composition on the joint microstructures. For alloys containing less than 36 atom% Si, an excessively vigorous …