Abstract：Above the freezing point of copper (1084.62 ℃) in the current temperature calibration system, there is no other pure metal fixed point. But the metal-carbon eutectic points, as a new type of fixed points with excellent reproducibility, add temperature fixed points above the freezing point of copper and develop the current level of high temperature measuring value transfer. Although the Fe-C eutectic point is very close to the freezing point of copper, it is still very useful to provide valuable experience for the perfusion and repetition of higher eutectic points. A one-class standard S-type thermocouple is used for measuring the temperature plateaus of Fe-C eutectic point, and the eutectic point temperatures fluctuate is in the range of 1152.4~1152.5 ℃.
［1］Pearce J V, Montag V, Lowe D, et al. Melting Temperature of High-Temperature Fixed Points for Thermocouple Calibrations［J］.International Journal of Thermophysics, 2011, 32(1):463-470.
［2］Yamada Y, Sakuma F, Ono A. Thermocouple Observations of Melting and Freezing Plateaus for Metal-Carbon Eutectics between the Copper and Palladium Points［J］. Metrologia, 2000, 37(1):71-73.
［3］Bloembergen P, Yamada Y, Sasajima N, et al. The Effect of the Eutectic Structure and the Residual Effect of Impurities on the Uncertainty in the Eutectic Temperatures of Fe-C and Co-C［J］. Metrologia, 2007, 44(5):279-293.
［4］Pearce J V, Edler F, Elliott C J, et al. Investigation of Pd-C Cells to Improve Thermocouple Calibration［J］. Metrologia, 2011, 48(5):375-381.
［5］Ongrai O, Pearce J V, Machin G, et al. Miniature Co-C Eutectic Fixed-Point Cells for Self-Validating Thermocouples［J］. Measurement Science and Technology, 2011, 22(1):015104.
［6］Parga C J, Journeau C, Tokuhiro A. Development of Metal-Carbon Eutectic Cells for Application as High Temperature Reference Points in Nuclear Reactor Severe Accident Tests: Results on the Fe-C, Co-C, Ti-C and Ru-C Alloys’ Melting/Freezing Transformation Temperature under Electromagnetic Induction Heating［J］. High Temperatures-High Pressures, 2012, 41(6):423-448.
［7］王铁军,柏成玉,原遵东,等. 高温共晶固定点的建立与复现［J］.计量学报,2007,28（z1）:23-27.
［8］郑玮,梁兴忠,吴健. 用于分度热电偶的Co-C高温共晶点的制作和复现性研究［J］.计量学报,2013,34（5）:430-434.
2016, Vol. 37 
