Abstract：The ZrC-C peritectic fixed point has a very high nominal phase transition temperature (2882℃), which is higher than the upper limit of most high-temperature heating furnaces. By improving the self-designed HT271 heating furnace, the upper limit of its working temperature was increased to above 2900℃, which met the requirements of the ZrC-C peritectic fixed point experiments. ZrC powder and C powder were used to configure the mixed powder, and the filling and realizing experiments of the ZrC-C peritectic fixed point were carried out, two sets of realizing cycle data were obtained. The result of the first cycle is better: the inflection point temperature is 2882.298℃; the inflection point uncertainty is 26.3mK. It has been verified that at a temperature above 2900℃, the improved HT271 heating furnace can be used for about 30 minutes stably. In order to extend the stable use time of the HT271 furnace at extremely high temperature, the next improvement plan is proposed.
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MENG Su, LIU Xu-dong, CAI Jing, DONG Lei. The Development and Evaluation of the ZrC-C Peritectic Point. Acta Metrologica Sinica, 2022, 43(1): 35-39.
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