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Differential barothermal analysis (DBA) of Ni-base alloys

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Abstract

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.

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Authors and Affiliations

  1. RAS Institute for Physical Chemistry of Ceramics, 48 Ozernaya, 119361, Moscow, Russia

    A. G. Padalko & A. N. Veselov

  2. Alstom Power Uniturbo JV 13 Kasatkina, P.O. Box 16, Moscow, 129301, Russia

    S. P. Avduhin

  3. RAS Institute of General and Inorganic Chemistry, 31 Leninski pr., 117071, Moscow, Russia

    G. D. Nipan & V. P. Sanygin

Authors
  1. A. G. Padalko
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  2. A. N. Veselov
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  3. S. P. Avduhin
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  4. G. D. Nipan
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  5. V. P. Sanygin
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Padalko, A.G., Veselov, A.N., Avduhin, S.P. et al. Differential barothermal analysis (DBA) of Ni-base alloys. Journal of Thermal Analysis and Calorimetry 72, 791–799 (2003). https://doi.org/10.1023/A:1025005912710

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  • DOI: https://doi.org/10.1023/A:1025005912710

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