Investigation of Fixed Points Exceeding 2500 °C Using Metal Carbide‐Carbon Eutectics

The melting and freezing plateaus of four metal carbide‐carbon (MC‐C) eutectics, B4C‐C, δ(Mo carbide)‐C, TiC‐C and ZrC‐C eutectics were investigated by radiation thermometry for the first time. The observed melting temperatures were 2386 °C, 2583 °C, 2761 °C and 2883 °C, respectively. The plateau shapes of δ(Mo carbide)‐C, TiC‐C and ZrC‐C eutectics are relatively flat compared to the quite rounded plateau shape of the B4C‐C eutectic. The results indicate that MC‐C eutectics can establish a new series of high‐temperature fixed points above 2500 °C.