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Binary Metal-Carbon Phase-Transition Temperatures



Donald R. Burgess Jr.


In this work, we compiled and evaluated eutectic and peritectic phase-transition temperatures for metal-carbon (e.g., Co-C, Re-C) and metal carbide-carbon compounds (e.g., Fe3C-C, HfC2-C) and selected recommended values for possible future use on the International Temperature Scale as primary or secondary fixed points. All these phase-transition temperatures are at high temperatures (1400 K to 3000 K) above the ITS-90 temperature scale, where the highest fixed point is the freezing point of copper (1357.77 K). The selected systems include 18 phase-transition temperatures: eight of these have very low uncertainties (0.12 K to 0.27 K) that likely will become primary fixed points on the International Temperature Scale, while ten of these have slightly higher uncertainties (0.4 K to 2.5 K) that may become secondary fixed points. Phase transitions for all other metal-carbon systems with higher uncertainties are also provided for completeness.
Technical Note (NIST TN) - 2278
Report Number


Metal-carbon, Phase-transitions, Temperatures, Critical evaluation


Burgess Jr., D. (2024), Binary Metal-Carbon Phase-Transition Temperatures, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online],, (Accessed April 15, 2024)
Created February 29, 2024