Thermodynamic assessment of the C–Si–Zr system

The reaction between Zr and SiC at 1473 K in vacuum has been studied. A layer structure was observed after high-temperature reactions between Zr and SiC complex. ZrCx was formed next to the SiC. Thermodynamic description for the C–Si–Zr system was developed based on its constituent binaries and critically reviewed experimental data. The Si–Zr binary has been modified. The high-temperature Zr5Si3 phase and the ternary compound Zr5Si3Cx was described as one phase, using the model (Zr)5(Si)3(C, Va)1. The calculated results were in good agreement with available experimental data.