Paper Title:
Thermodynamics and Microstructure of Co-V8C7 Alloy
  Abstract

The thermodynamic properties of the Co-V-C and Co-V8C7 systems are of interest for superfine cemented carbide applications. The model parameters for the Gibbs energy of the individual phases have been evaluated using the CALPHAD method by combining the recently optimized phase diagram information of the V-C, Co-C and Co-V system. The isothermal sections of ternary system Co-V-C at 1400 °C and 1600 °C, as well as the vertical section of Co-V8C7 system were extrapolated. The calculated results, especially the liquid forming temperature of Co-V8C7 system was validated with experiments by using differential scanning calorimetry (DSC) analysis. Through controlling the carbon activity, various vertical sections with different carbon activity in Co-V8C7 system are presented.

  Info
Periodical
Materials Science Forum (Volumes 492-493)
Edited by
Omer Van der Biest, Michael Gasik, Jozef Vleugels
Pages
523-530
DOI
10.4028/www.scientific.net/MSF.492-493.523
Citation
S. G. Huang, L. Li, J. Vleugels, O. Van der Biest, "Thermodynamics and Microstructure of Co-V8C7 Alloy", Materials Science Forum, Vols. 492-493, pp. 523-530, 2005
Online since
August 2005
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Price
$32.00
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