Thermal measuring and testing – Transformation point determination – By thermal arrest
Patent
1996-10-16
1998-11-10
Gutierrez, Diego F. F.
Thermal measuring and testing
Transformation point determination
By thermal arrest
374 25, G01N 2504
Patent
active
058333665
ABSTRACT:
A method and apparatus for determining the freezing points of a metal by inducing solidification in a cooling liquid metal sample in a supercooled state and utilizing specific detected peak values or changes in slope in a temperature/time plot as the sample cools, begins solidification and recalesces. It was found that the maximum temperature reached after the second rise, if two rises occur, the maximum of a single rise, or the temperature at which the rate of temperature drop decreases, if no temperature rise occurs, provides a useful approximation of the liquidus temperature and hence the freezing point of the sample.
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Critical viewpoints on the methods of realizing the metal freezing points of the ITS-90 C.K. MA Rev. Scl. Instrum. 66 (8), Aug. 1995 American Institute of Physics p. 4233.
Bitner Ronald G.
Gutierrez Diego F. F.
National Research Council of Canada
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