Differential barothermal analysis (DBA) of Ni-base alloys

The technique of differential barothermal analysis (DBA) combines the hot isostatic pressing technique and classical differential thermal analysis has been elaborated. This technique allows the study of the phase equilibria in the most of inorganic systems under pressure up to 200 MPa and temperatur...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2003-01, Vol.72 (3), p.791-799
Main Authors: Padalko, A G, Veselov, A N, Avduhin, S P, Nipan, G D, Sanygin, V P
Format: Article
Language:English
Subjects:
Alloys
Base metal
Coefficients
Differential thermal analysis
Hot isostatic pressing
Liquidus
Melting points
Nickel base alloys
Phase equilibria
Solidus
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Summary:The technique of differential barothermal analysis (DBA) combines the hot isostatic pressing technique and classical differential thermal analysis has been elaborated. This technique allows the study of the phase equilibria in the most of inorganic systems under pressure up to 200 MPa and temperatures up to 2000°C. The Ni-base alloy with the solidus, liquidus, g-phase and carbides dissolution temperatures of 1328, 1390, 1272 and 1255°C, accordingly, was chosen as a model material. By DBA technique the pressure coefficients of the above mentioned temperatures were established. The values of the obtained coefficients are 3-5 times larger than the melting point pressure coefficient for the pure Ni (the alloy base metal). The discussion of the data obtained is carried out.
ISSN:1388-6150
1588-2926
DOI:10.1023/A:1025005912710