Abstract
This article presents the results of an investigation of alloys of the Cr-Mo-C system at temperatures of existence of solid phases with the liquid one and in the subsolidus area, which made it possible to construct the high temperature area of the phase diagram of the Mo-Mo/sub 2/C-Cr/sub 7/C/sub 3/-Cr partial system. The phase transformations were investigated by differential thermal analysis on an instrument with a W-VR-20 string thermocouple in high-purity helium. The specimens were placed in a crucible of Y/sub 2/O/sub 3/, HfO/sub 2/, or Sc/sub 2/O/sub 3/. The calibration was done using Al, Au, Pd, Pt, and Rh as reference points (auxiliary ones carbonyl iron and + Mo/sub 2/C eutectic). To decrease and take into consideration the error in temperature measurement of the nonvariant equilibria the tests were made several times. The error in reproduction of the temperature scale was determined with the use of regression analysis.
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