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Metal-carbon and metal carbide-carbon eutectic fixed points as high-temperature standards

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3 Author(s)
N. Sasajima ; AIST, Nat. Metrol. Inst. of Japan, Tsukuba, Japan ; Y. Yamada ; F. Sakuma

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.

Published in:

SICE 2002. Proceedings of the 41st SICE Annual Conference  (Volume:4 )

Date of Conference:

5-7 Aug. 2002