Metallurgical and Materials Transactions A

, Volume 45, Issue 11, pp 4820–4828 | Cite as

Experimental Determination of the Solubility of Co in the Cr-Based Carbides Cr23C6, Cr7C3, and Cr3C2

  • Bartek KaplanEmail author
  • Andreas Markström
  • Susanne Norgren
  • Malin Selleby


Thermodynamic calculations based on the CALPHAD method are nowadays often applied in the design of new materials due to increasing demands on shorter lead times for development. However, such calculations rely heavily on the assessed thermodynamic descriptions, which in turn rely on the amount and quality of available experimental data, especially for binary and ternary sub-systems. The ternary Co-Cr-C system is an extremely important subsystem to, e.g., multi-component cemented carbide grades, such as W-Co-Cr-M-C (M = Ti,Ta,Nb,V,Zr,Hf), as well as Cr-containing Co-base alloys. In the case of the Co-Cr-C system, there is a lack of reliable data on the solubility of Co in Cr-carbides. Therefore, the present work concerns an experimental study of the solubility of Co in all three of the Cr-based carbides, i.e., Cr23C6, Cr7C3, and Cr3C2. This was done by synthesizing appropriate samples in the M7C3+M23C6+liquid and M7C3+M3C2+graphite three-phase fields. The results show that a recent thermodynamic description of the Co-Cr-C system is unable to reproduce the experimentally determined solubilities. Therefore, the present study provides important input for future alloy development and improvement of the thermodynamic description of the Co-Cr-C system.


Carbide Thermodynamic Description M7C3 Carbide Cement Carbide Heat Treatment Time 
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This work was performed in a research project funded and supported by the Swedish Research Council (VR) and Sandvik Coromant. Marja-Liisa Nykänen and Dr. Håkan Hollmark, both at Sandvik Coromant, are acknowledged for their assistance with the XRD measurements. Prof. Du Sichen at the department of Materials Science and Engineering, KTH, is acknowledged for allocating the necessary furnace time for some of the experiments.


  1. 1.
    J. Zackrisson, B. Jansson, G. S. Uphadyaya, H.-O. Andrén: Int. J. Refract. Met. Hard Mater., 1998, vol. 16, pp. 417-422.CrossRefGoogle Scholar
  2. 2.
    R. N. J. Taylor, R. B. Waterhouse: J. Mater. Sci., 1983, vol. 18, pp. 3265-3289.CrossRefGoogle Scholar
  3. 3.
    H. L. Lukas, S. G. Fries, B. Sundman: Computational Thermodynamics - The Calphad Method, 1st ed., Cambridge University Press, New York, NY, 2007.CrossRefGoogle Scholar
  4. 4.
    W. Köster, F. Sperner: Arch. Eisenhuttenwes., 1955, vol. 26, pp. 555-559.Google Scholar
  5. 5.
    A. Markström, S. Norgren, K. Frisk, B. Jansson, T. Sterneland: Int. J. Mater. Res., 2006, vol. 97, pp. 1243-1250.CrossRefGoogle Scholar
  6. 6.
    T. Sterneland, A. Markström, S. Norgren, R. E. Aune, S. Seetharaman: Metall. Mater. Trans. A, 2006, vol. 37A, pp. 3023-3028.CrossRefGoogle Scholar
  7. 7.
    A. Kusoffsky, B. Jansson: CALPHAD: Comput. Coupling Phase Diagrams Thermochem., 1997, vol 21, pp. 321-333.CrossRefGoogle Scholar
  8. 8.
    J. O. Andersson, T. Helander, L. Höglund, P. F. Shi, B. Sundman: CALPHAD: Comput. Coupling Phase Diagrams Thermochem., 2002, vol. 26, pp. 273-312.CrossRefGoogle Scholar
  9. 9.
    A. F. Guillermet: Z. Metallkd., 1987, vol. 78, pp. 700-709.Google Scholar
  10. 10.
    B. Kaplan, A. Markström, A. Blomqvist, S. Norgren, and M. Selleby: CALPHAD, 2014, vol. 46, pp. 226–36.Google Scholar
  11. 11.
    K. Frisk and A. Markström: Int. J. Mater. Res., 2008, vol. 99(3), pp. 287–93.CrossRefGoogle Scholar
  12. 12.
    A. Markström, B. Sundman, K. Frisk: J. Phase Eq. Diff., 2005, vol. 26, pp. 152-160.CrossRefGoogle Scholar
  13. 13.
    P. Gustafson: Met. Trans. A, 1988, vol. 19A, pp. 2547-2554.CrossRefGoogle Scholar
  14. 14.
    B. Lindahl: MSc Thesis, KTH Royal Institute of Technology, Department of Materials Science and Engineering, Stockholm, Sweden, 2010.Google Scholar

Copyright information

© The Minerals, Metals & Materials Society and ASM International 2014

Authors and Affiliations

  • Bartek Kaplan
    • 1
    • 2
    Email author
  • Andreas Markström
    • 1
    • 3
  • Susanne Norgren
    • 2
    • 4
  • Malin Selleby
    • 1
  1. 1.Department of Materials Science and EngineeringKTH Royal Institute of TechnologyStockholmSweden
  2. 2.Sandvik Coromant R&DStockholmSweden
  3. 3.Thermo-Calc Software ABStockholmSweden
  4. 4.Ångström Tribomaterials Group, Applied Materials ScienceUppsala UniversityUppsalaSweden

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