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Powder Metallurgy and Metal Ceramics

, Volume 44, Issue 3–4, pp 156–160 | Cite as

Thermodynamic Properties of Si - Mn - Y System Alloys

  • O. A. Beloborodova
  • Valentina S. Sudavtsova
  • T. M. Zinevich
  • N. V. Kotova
  • V. M. Dubina
Article

Abstract

High-temperature isoperibolic calorimetry has been used to measure the partial enthalpies of mixing for yttrium in the Si - Mn - Y ternary system at 1775 K along sections with various atomic ratios of silicon to manganese (0.85/0.15; 0.7/0.3; 0.6/0.4; 0.5/0.5; 0.3/0.7) for yttrium concentrations in the range 0 < xY < 0.4 together with the partial molar enthalpies of manganese for xSi/xY = 0.8/0.2. The integral enthalpies of mixing have been calculated from the partial ones for yttrium by Darken’s method. The addition of yttrium to the Si - M binary system to give the ternary Si - Mn - Y system increases the exothermic effects of the alloying substantially. There is a substantial effect on the thermodynamic parameters of the ternary alloys from the atomic interactions in the Si - Y and Si - Mn binary systems.

Keywords

isoperibolic calorimetry mixing enthalpy ternary system yttrium silicon manganese 

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • O. A. Beloborodova
    • 1
  • Valentina S. Sudavtsova
    • 1
  • T. M. Zinevich
    • 1
  • N. V. Kotova
    • 1
  • V. M. Dubina
    • 1
  1. 1.Taras Shevchenko Kiev National UniversityKievUkraine

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