Title :
Metal-carbon and metal carbide-carbon eutectic fixed points as high-temperature standards
Author :
Sasajima, N. ; Yamada, Y. ; Sakuma, E.
Author_Institution :
AIST, Nat. Metrol. Inst. of Japan, Tsukuba, Japan
Abstract :
Results of scale uncertainty simulations using metal-carbon (M-C) and metal carbide-carbon (MC-C) eutectic fixed points showed that extension of the fixed-point temperature range to above 2500°C is the key to the improvement of the scale. From this viewpoint δ(Mo carbide)-C, TiC-C and ZrC-C eutectics were investigated by radiation thermometry. The observed melting temperatures were 2583°C, 2761°C and 2882°C, respectively. The results indicate that MC-C eutectics can establish a new series of high-temperature fixed points above 2500°C.
Keywords :
eutectic alloys; high-temperature techniques; measurement uncertainty; melting point; spectral methods of temperature measurement; temperature scales; 2500 degC; MoC-C; TiC-C; ZrC-C; high-temperature fixed point; measurement standard; melting temperature; metal carbide-carbon eutectic; metal-carbon eutectic; radiation thermometry; temperature scale; uncertainty simulation; Calibration; Copper; Equations; Interpolation; Laboratories; Metrology; Reproducibility of results; Temperature distribution; Uncertainty;
Conference_Titel :
SICE 2002. Proceedings of the 41st SICE Annual Conference
Print_ISBN :
0-7803-7631-5
DOI :
10.1109/SICE.2002.1195714
